diff --git a/targets/COMMON/openairinterface5g_limits.h b/targets/COMMON/openairinterface5g_limits.h
index 6185dd8bbe5a08bf1400430f18d21945f51f1b31..d9590873e82f47ed935c49eb1deb5f8a409f8e74 100644
--- a/targets/COMMON/openairinterface5g_limits.h
+++ b/targets/COMMON/openairinterface5g_limits.h
@@ -1,3 +1,6 @@
+#ifndef OPENAIRINTERFACE5G_LIMITS_H_
+#define OPENAIRINTERFACE5G_LIMITS_H_
+
 #if defined(CBMIMO1) || defined(EXMIMO) || defined(OAI_USRP)
 	#define NUMBER_OF_eNB_MAX 1
 	#define NUMBER_OF_UE_MAX 16
@@ -18,3 +21,5 @@
 		#define NUMBER_OF_CONNECTED_eNB_MAX 1 // to save some memory
 	#endif
 #endif
+
+#endif