diff --git a/client/X11/xf_graphics.c b/client/X11/xf_graphics.c
index de7e03f23..67c8dec41 100644
--- a/client/X11/xf_graphics.c
+++ b/client/X11/xf_graphics.c
@@ -202,6 +202,10 @@ static BOOL xf_Bitmap_SetSurface(rdpContext* context, rdpBitmap* bitmap,
                                  BOOL primary)
 {
 	xfContext* xfc = (xfContext*) context;
+
+	if (!context || (!bitmap && !primary))
+		return FALSE;
+
 	xf_lock_x11(xfc, FALSE);
 
 	if (primary)