diff --git a/indra/llkdu/llkdumem.h b/indra/llkdu/llkdumem.h
index 5bc93fd8be..8d24bd2415 100644
--- a/indra/llkdu/llkdumem.h
+++ b/indra/llkdu/llkdumem.h
@@ -28,7 +28,9 @@
 #define LL_LLKDUMEM_H
 
 //<FS:TS> Silence Clang warning the flag doesn't for some reason
+#if LL_DARWIN
 #pragma clang diagnostic ignored "-Woverloaded-virtual"
+#endif
 //</FS:TS>
 
 // Support classes for reading and writing from memory buffers in KDU