diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index 3e7459ee8a8896f08977f4a08e60bd76c7dc1278..0e64d7152af6523a22151388dc6dc613dfc09999 100644
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -243,7 +243,9 @@ static bool handleAnisotropicChanged(const LLSD& newvalue)
 
 static bool handleVSyncChanged(const LLSD& newvalue)
 {
+#if LL_WINDOWS
     gViewerWindow->getWindow()->toggleVSync(newvalue.asBoolean());
+#endif
     return true;
 }