diff --git a/Xext/panoramiX.c b/Xext/panoramiX.c
index d1e7268040..5d533a4649 100644
--- a/Xext/panoramiX.c
+++ b/Xext/panoramiX.c
@@ -1049,7 +1049,6 @@ ProcXineramaIsActive(ClientPtr client)
     {
 	/* The following hack fools clients into thinking that Xinerama
 	 * is disabled even though it is not. */
-	extern Bool PanoramiXExtensionDisabledHack;
 	rep.state = !noPanoramiXExtension && !PanoramiXExtensionDisabledHack;
     }
 #else
diff --git a/include/globals.h b/include/globals.h
index 95e11fe707..d396d19c88 100644
--- a/include/globals.h
+++ b/include/globals.h
@@ -50,6 +50,7 @@ extern Bool PanoramiXMapped;
 extern Bool PanoramiXVisibilityNotifySent;
 extern Bool PanoramiXWindowExposureSent;
 extern Bool PanoramiXOneExposeRequest;
+extern Bool PanoramiXExtensionDisabledHack;
 #endif
 
 #ifdef BIGREQS