diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index b96023f6132569cc2e9045d7e1d41df57d814f30..82c5efe0ac6f649712ce963bf9a32b71f7c3e914 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -70,11 +70,15 @@ const U32 FENCE_WAIT_TIME_NANOSECONDS = 10000;  //1 ms
 class LLGLSyncFence : public LLGLFence
 {
 public:
+#ifdef GL_ARB_sync
 	GLsync mSync;
+#endif
 	
 	LLGLSyncFence()
 	{
+#ifdef GL_ARB_sync
 		mSync = 0;
+#endif
 	}
 
 	~LLGLSyncFence()
@@ -108,8 +112,8 @@ class LLGLSyncFence : public LLGLFence
 				static S32 waits = 0;
 				waits++;
 			}
-#endif
 		}
+#endif
 	}