diff --git a/include/asterisk/compat.h b/include/asterisk/compat.h
index 85472837c0..ccde1eec7d 100644
--- a/include/asterisk/compat.h
+++ b/include/asterisk/compat.h
@@ -22,10 +22,12 @@
 
 #include "asterisk/compiler.h"
 
+#if !defined(__cplusplus) && !defined(c_plusplus)
 #ifndef __STDC_VERSION__
 /* flex output wants to find this defined. */
 #define	__STDC_VERSION__ 0
 #endif
+#endif
 
 #include <inttypes.h>
 #include <limits.h>