diff --git a/tests/50-constraint-OK.asn1 b/tests/50-constraint-OK.asn1
index 83f083f237bdc9b793105eb3b5beb4b738caa118..b8812bc84e92a50618f84eb5e14da3737de2ba69 100644
--- a/tests/50-constraint-OK.asn1
+++ b/tests/50-constraint-OK.asn1
@@ -3,13 +3,15 @@
 
 -- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
 -- .spelio.software.asn1c.test (9363.1.5.1)
--- .50
+-- .50 1
+-- .50 2
 
 ModuleNestedConstraintsCheck
 	{ iso org(3) dod(6) internet (1) private(4) enterprise(1)
-		spelio(9363) software(1) asn1c(5) test(1) 50 }
+		spelio(9363) software(1) asn1c(5) test(1) 50 1 }
 	DEFINITIONS ::=
 BEGIN
+	IMPORTS Identifier FROM IdentifierModule;
 
 	Int1 ::= INTEGER
 	Int2 ::= Int1 (0..MAX)		-- X.680-0207::41.4.4
@@ -47,4 +49,27 @@ BEGIN
 	Utf8-2 ::= Utf8-1 (SIZE(1..2))
 	Utf8-1 ::= UTF8String
 
+	VisibleIdentifier ::= Identifier
+
+END
+
+
+IdentifierModule
+	{ iso org(3) dod(6) internet (1) private(4) enterprise(1)
+		spelio(9363) software(1) asn1c(5) test(1) 50 2 }
+	DEFINITIONS ::=
+BEGIN
+	EXPORTS Identifier;
+
+	maxIdentifier INTEGER ::= 32
+
+	Identifier ::=
+	    VisibleString ( FROM
+	   ("A"|"a"|"B"|"b"|"C"|"c"|"D"|"d"|"E"|"e"|"F"|"f"|
+	   "G"|"g"|"H"|"h"|"I"|"i"|"J"|"j"|"K"|"k"|"L"|"l"|
+	   "M"|"m"|"N"|"n"|"O"|"o"|"P"|"p"|"Q"|"q"|"R"|"r"|
+	   "S"|"s"|"T"|"t"|"U"|"u"|"V"|"v"|"W"|"w"|"X"|"x"|
+	   "Y"|"y"|"Z"|"z"|"$"|"_"|"0"|"1"|"2"|"3"|"4"|"5"|
+	   "6"|"7"|"8"|"9") ) (SIZE(1..maxIdentifier))
+
 END
diff --git a/tests/50-constraint-OK.asn1.-EFprint-constraints b/tests/50-constraint-OK.asn1.-EFprint-constraints
index fbe9ad3038ced579c42debd8a4c89183a679b965..8fb42287a37bce51bb499db79915d675f2f72716 100644
Binary files a/tests/50-constraint-OK.asn1.-EFprint-constraints and b/tests/50-constraint-OK.asn1.-EFprint-constraints differ
diff --git a/tests/50-constraint-OK.asn1.-P b/tests/50-constraint-OK.asn1.-P
index 545ddba155cbc4fe211eccc05a5796e9d91c4fea..305dc5023a10d91201c2142625e4526c92d7bcc6 100644
--- a/tests/50-constraint-OK.asn1.-P
+++ b/tests/50-constraint-OK.asn1.-P
@@ -2655,3 +2655,297 @@ asn1_TYPE_descriptor_t asn1_DEF_Utf8_1 = {
 	0	/* No specifics */
 };
 
+
+/*** <<< INCLUDES [VisibleIdentifier] >>> ***/
+
+#include <Identifier.h>
+
+/*** <<< TYPE-DECLS [VisibleIdentifier] >>> ***/
+
+
+typedef Identifier_t	 VisibleIdentifier_t;
+
+/*** <<< FUNC-DECLS [VisibleIdentifier] >>> ***/
+
+extern asn1_TYPE_descriptor_t asn1_DEF_VisibleIdentifier;
+asn_constr_check_f VisibleIdentifier_constraint;
+ber_type_decoder_f VisibleIdentifier_decode_ber;
+der_type_encoder_f VisibleIdentifier_encode_der;
+asn_struct_print_f VisibleIdentifier_print;
+asn_struct_free_f VisibleIdentifier_free;
+
+/*** <<< CTABLES [VisibleIdentifier] >>> ***/
+
+static int permitted_alphabet_table_14[256] = {
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/*                  */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/*                  */
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,	/*     $            */
+1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,	/* 0123456789       */
+0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,	/*  ABCDEFGHIJKLMNO */
+1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1,	/* PQRSTUVWXYZ    _ */
+0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,	/*  abcdefghijklmno */
+1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,	/* pqrstuvwxyz      */
+};
+
+static int check_permitted_alphabet_14(const void *sptr) {
+	int *table = permitted_alphabet_table_14;
+	/* The underlying type is VisibleString */
+	const VisibleString_t *st = sptr;
+	const uint8_t *ch = st->buf;
+	const uint8_t *end = ch + st->size;
+	
+	for(; ch < end; ch++) {
+		uint8_t cv = *ch;
+		if(!table[cv]) return -1;
+	}
+	return 0;
+}
+
+
+/*** <<< CODE [VisibleIdentifier] >>> ***/
+
+int
+VisibleIdentifier_constraint(asn1_TYPE_descriptor_t *td, const void *sptr,
+			asn_app_consume_bytes_f *app_errlog, void *app_key) {
+	
+	const Identifier_t *st = sptr;
+	size_t size;
+	
+	if(!sptr) {
+		_ASN_ERRLOG(app_errlog, app_key,
+			"%s: value not given (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+	
+	size = st->size;
+	
+	if((size >= 1 && size <= 32)
+		 && !check_permitted_alphabet_14(sptr)) {
+		/* Constraint check succeeded */
+		return 0;
+	} else {
+		_ASN_ERRLOG(app_errlog, app_key,
+			"%s: constraint failed (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+}
+
+/*
+ * This type is implemented using Identifier,
+ * so adjust the DEF appropriately.
+ */
+static void
+VisibleIdentifier_inherit_TYPE_descriptor(asn1_TYPE_descriptor_t *td) {
+	td->ber_decoder    = asn1_DEF_Identifier.ber_decoder;
+	td->der_encoder    = asn1_DEF_Identifier.der_encoder;
+	td->free_struct    = asn1_DEF_Identifier.free_struct;
+	td->print_struct   = asn1_DEF_Identifier.print_struct;
+	td->last_tag_form  = asn1_DEF_Identifier.last_tag_form;
+	td->elements       = asn1_DEF_Identifier.elements;
+	td->elements_count = asn1_DEF_Identifier.elements_count;
+	td->specifics      = asn1_DEF_Identifier.specifics;
+}
+
+ber_dec_rval_t
+VisibleIdentifier_decode_ber(asn1_TYPE_descriptor_t *td,
+		void **structure, void *bufptr, size_t size, int tag_mode) {
+	VisibleIdentifier_inherit_TYPE_descriptor(td);
+	return td->ber_decoder(td, structure, bufptr, size, tag_mode);
+}
+
+der_enc_rval_t
+VisibleIdentifier_encode_der(asn1_TYPE_descriptor_t *td,
+		void *structure, int tag_mode, ber_tlv_tag_t tag,
+		asn_app_consume_bytes_f *cb, void *app_key) {
+	VisibleIdentifier_inherit_TYPE_descriptor(td);
+	return td->der_encoder(td, structure, tag_mode, tag, cb, app_key);
+}
+
+int
+VisibleIdentifier_print(asn1_TYPE_descriptor_t *td, const void *struct_ptr,
+		int ilevel, asn_app_consume_bytes_f *cb, void *app_key) {
+	VisibleIdentifier_inherit_TYPE_descriptor(td);
+	return td->print_struct(td, struct_ptr, ilevel, cb, app_key);
+}
+
+void
+VisibleIdentifier_free(asn1_TYPE_descriptor_t *td,
+		void *struct_ptr, int contents_only) {
+	VisibleIdentifier_inherit_TYPE_descriptor(td);
+	td->free_struct(td, struct_ptr, contents_only);
+}
+
+
+/*** <<< STAT-DEFS [VisibleIdentifier] >>> ***/
+
+static ber_tlv_tag_t asn1_DEF_VisibleIdentifier_tags[] = {
+	(ASN_TAG_CLASS_UNIVERSAL | (26 << 2))
+};
+asn1_TYPE_descriptor_t asn1_DEF_VisibleIdentifier = {
+	"VisibleIdentifier",
+	VisibleIdentifier_constraint,
+	VisibleIdentifier_decode_ber,
+	VisibleIdentifier_encode_der,
+	VisibleIdentifier_print,
+	VisibleIdentifier_free,
+	0,	/* Use generic outmost tag fetcher */
+	asn1_DEF_VisibleIdentifier_tags,
+	sizeof(asn1_DEF_VisibleIdentifier_tags)
+		/sizeof(asn1_DEF_VisibleIdentifier_tags[0]), /* 1 */
+	asn1_DEF_VisibleIdentifier_tags,	/* Same as above */
+	sizeof(asn1_DEF_VisibleIdentifier_tags)
+		/sizeof(asn1_DEF_VisibleIdentifier_tags[0]), /* 1 */
+	-0,	/* Unknown yet */
+	0, 0,	/* No members */
+	0	/* No specifics */
+};
+
+
+/*** <<< INCLUDES [Identifier] >>> ***/
+
+#include <VisibleString.h>
+
+/*** <<< TYPE-DECLS [Identifier] >>> ***/
+
+
+typedef VisibleString_t	 Identifier_t;
+
+/*** <<< FUNC-DECLS [Identifier] >>> ***/
+
+extern asn1_TYPE_descriptor_t asn1_DEF_Identifier;
+asn_constr_check_f Identifier_constraint;
+ber_type_decoder_f Identifier_decode_ber;
+der_type_encoder_f Identifier_encode_der;
+asn_struct_print_f Identifier_print;
+asn_struct_free_f Identifier_free;
+
+/*** <<< CTABLES [Identifier] >>> ***/
+
+static int permitted_alphabet_table_15[256] = {
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/*                  */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/*                  */
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,	/*     $            */
+1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,	/* 0123456789       */
+0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,	/*  ABCDEFGHIJKLMNO */
+1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1,	/* PQRSTUVWXYZ    _ */
+0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,	/*  abcdefghijklmno */
+1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,	/* pqrstuvwxyz      */
+};
+
+static int check_permitted_alphabet_15(const void *sptr) {
+	int *table = permitted_alphabet_table_15;
+	/* The underlying type is VisibleString */
+	const VisibleString_t *st = sptr;
+	const uint8_t *ch = st->buf;
+	const uint8_t *end = ch + st->size;
+	
+	for(; ch < end; ch++) {
+		uint8_t cv = *ch;
+		if(!table[cv]) return -1;
+	}
+	return 0;
+}
+
+
+/*** <<< CODE [Identifier] >>> ***/
+
+int
+Identifier_constraint(asn1_TYPE_descriptor_t *td, const void *sptr,
+			asn_app_consume_bytes_f *app_errlog, void *app_key) {
+	
+	const VisibleString_t *st = sptr;
+	size_t size;
+	
+	if(!sptr) {
+		_ASN_ERRLOG(app_errlog, app_key,
+			"%s: value not given (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+	
+	size = st->size;
+	
+	if((size >= 1 && size <= 32)
+		 && !check_permitted_alphabet_15(sptr)) {
+		/* Constraint check succeeded */
+		return 0;
+	} else {
+		_ASN_ERRLOG(app_errlog, app_key,
+			"%s: constraint failed (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+}
+
+/*
+ * This type is implemented using VisibleString,
+ * so adjust the DEF appropriately.
+ */
+static void
+Identifier_inherit_TYPE_descriptor(asn1_TYPE_descriptor_t *td) {
+	td->ber_decoder    = asn1_DEF_VisibleString.ber_decoder;
+	td->der_encoder    = asn1_DEF_VisibleString.der_encoder;
+	td->free_struct    = asn1_DEF_VisibleString.free_struct;
+	td->print_struct   = asn1_DEF_VisibleString.print_struct;
+	td->last_tag_form  = asn1_DEF_VisibleString.last_tag_form;
+	td->elements       = asn1_DEF_VisibleString.elements;
+	td->elements_count = asn1_DEF_VisibleString.elements_count;
+	td->specifics      = asn1_DEF_VisibleString.specifics;
+}
+
+ber_dec_rval_t
+Identifier_decode_ber(asn1_TYPE_descriptor_t *td,
+		void **structure, void *bufptr, size_t size, int tag_mode) {
+	Identifier_inherit_TYPE_descriptor(td);
+	return td->ber_decoder(td, structure, bufptr, size, tag_mode);
+}
+
+der_enc_rval_t
+Identifier_encode_der(asn1_TYPE_descriptor_t *td,
+		void *structure, int tag_mode, ber_tlv_tag_t tag,
+		asn_app_consume_bytes_f *cb, void *app_key) {
+	Identifier_inherit_TYPE_descriptor(td);
+	return td->der_encoder(td, structure, tag_mode, tag, cb, app_key);
+}
+
+int
+Identifier_print(asn1_TYPE_descriptor_t *td, const void *struct_ptr,
+		int ilevel, asn_app_consume_bytes_f *cb, void *app_key) {
+	Identifier_inherit_TYPE_descriptor(td);
+	return td->print_struct(td, struct_ptr, ilevel, cb, app_key);
+}
+
+void
+Identifier_free(asn1_TYPE_descriptor_t *td,
+		void *struct_ptr, int contents_only) {
+	Identifier_inherit_TYPE_descriptor(td);
+	td->free_struct(td, struct_ptr, contents_only);
+}
+
+
+/*** <<< STAT-DEFS [Identifier] >>> ***/
+
+static ber_tlv_tag_t asn1_DEF_Identifier_tags[] = {
+	(ASN_TAG_CLASS_UNIVERSAL | (26 << 2))
+};
+asn1_TYPE_descriptor_t asn1_DEF_Identifier = {
+	"Identifier",
+	Identifier_constraint,
+	Identifier_decode_ber,
+	Identifier_encode_der,
+	Identifier_print,
+	Identifier_free,
+	0,	/* Use generic outmost tag fetcher */
+	asn1_DEF_Identifier_tags,
+	sizeof(asn1_DEF_Identifier_tags)
+		/sizeof(asn1_DEF_Identifier_tags[0]), /* 1 */
+	asn1_DEF_Identifier_tags,	/* Same as above */
+	sizeof(asn1_DEF_Identifier_tags)
+		/sizeof(asn1_DEF_Identifier_tags[0]), /* 1 */
+	-0,	/* Unknown yet */
+	0, 0,	/* No members */
+	0	/* No specifics */
+};
+