diff --git a/code/nel/include/nel/misc/types_nl.h b/code/nel/include/nel/misc/types_nl.h
index 32b6a85d0..64d82d5bf 100644
--- a/code/nel/include/nel/misc/types_nl.h
+++ b/code/nel/include/nel/misc/types_nl.h
@@ -191,6 +191,10 @@
 #			define NL_ISO_STDTR1_HEADER(header) <header>
 #			define NL_ISO_STDTR1_NAMESPACE std
 #		endif
+#	endif
+	// clang define GCC version for compatibility
+#	ifdef __clang__
+#		define CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
 #	endif
 #endif