diff --git a/rtengine/opthelper.h b/rtengine/opthelper.h
index bee97f6b2..4b34fc58f 100644
--- a/rtengine/opthelper.h
+++ b/rtengine/opthelper.h
@@ -69,7 +69,7 @@
         #define ALIGNED64
         #define ALIGNED16
     #endif
-    #if !defined(__clang__) && defined _OPENMP
+    #if defined _OPENMP
         #define _RT_NESTED_OPENMP
     #endif
 #endif