diff -u a/SDL-1.2.15/src/video/x11/SDL_x11events.c b/SDL-1.2.15/src/video/x11/SDL_x11events.c
--- a/SDL-1.2.15/src/video/x11/SDL_x11events.c	2012-01-19 15:30:06.000000000 +0900
+++ b/SDL-1.2.15/src/video/x11/SDL_x11events.c	2016-06-05 14:41:00.483436208 +0900
@@ -827,8 +827,8 @@
 #endif
 		if ((X11_PendingConfigureNotifyWidth != -1) &&
 		    (X11_PendingConfigureNotifyHeight != -1)) {
-		    if ((xevent.xconfigure.width != X11_PendingConfigureNotifyWidth) &&
-			(xevent.xconfigure.height != X11_PendingConfigureNotifyHeight)) {
+		    if ((xevent.xconfigure.width == X11_PendingConfigureNotifyWidth) &&
+			(xevent.xconfigure.height == X11_PendingConfigureNotifyHeight)) {
 			    /* Event is from before the resize, so ignore. */
 			    break;
 		    }