diff --git a/hw/kdrive/ephyr/ephyrinit.c b/hw/kdrive/ephyr/ephyrinit.c
index a76da03b4..c33892ce0 100644
--- a/hw/kdrive/ephyr/ephyrinit.c
+++ b/hw/kdrive/ephyr/ephyrinit.c
@@ -47,6 +47,7 @@ InitCard (char *name)
 void
 InitOutput (ScreenInfo *pScreenInfo, int argc, char **argv)
 {
+  noGlxExtension=TRUE;
   KdInitOutput (pScreenInfo, argc, argv);
 }