diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
index 1aa36d3..7e539b6 100644
--- a/drivers/video/modedb.c
+++ b/drivers/video/modedb.c
@@ -791,8 +791,9 @@
 			if (diff > d) {
 				diff = d;
 				best = mode;
-			} else if (diff == d && mode->refresh > best->refresh)
-			    best = mode;
+			} else if (diff == d && best &&
+				   mode->refresh > best->refresh)
+				best = mode;
 		}
 	}
 	return best;