diff --git a/common/vid_x11.c b/common/vid_x11.c
index d7067f8..04f62b1 100644
--- a/common/vid_x11.c
+++ b/common/vid_x11.c
@@ -651,6 +651,13 @@ void VID_Init (unsigned char *palette)
 
 // map the window
 	XMapWindow(x_disp, x_win);
+#ifdef HAS_VIDMODE
+	if (hasvidmode && vid_fullscreen->value) {
+		XRaiseWindow(x_disp, x_win);
+		XGrabKeyboard(x_disp, x_win, 1, GrabModeAsync, GrabModeAsync,
+					  CurrentTime);
+	}
+#endif
 
 // wait for first exposure event
 	{