diff --git a/vidix/drivers/mga_vid.c b/vidix/drivers/mga_vid.c
index 73a5ebaad9..3a96d97185 100644
--- a/vidix/drivers/mga_vid.c
+++ b/vidix/drivers/mga_vid.c
@@ -1455,6 +1455,7 @@ int vixGetGrKeys(vidix_grkey_t *grkey)
 int vixSetGrKeys(const vidix_grkey_t *grkey)
 {
     memcpy(&mga_grkey, grkey, sizeof(vidix_grkey_t));
+    mga_vid_write_regs(0);
     return(0);
 }