diff --git a/skeletons/xer_support.h b/skeletons/xer_support.h
index a1a010c61ef74b49efb5387ef6543951dcabc0dd..2fa1ae96f127f2a8a17a9fa19925f7e9938a2097 100644
--- a/skeletons/xer_support.h
+++ b/skeletons/xer_support.h
@@ -6,6 +6,8 @@
 #ifndef	_XER_SUPPORT_H_
 #define	_XER_SUPPORT_H_
 
+#include <asn_system.h>		/* Platform-specific types */
+
 /*
  * Types of data transferred to the application.
  */