diff -rupN rsync-3.1.1pre1.orig/util.c rsync-3.1.1pre1/util.c
--- rsync-3.1.1pre1.orig/util.c	2014-01-26 17:29:15.000000000 +0000
+++ rsync-3.1.1pre1/util.c	2014-05-31 01:26:17.525693440 +0000
@@ -1318,14 +1318,14 @@ char *timestring(time_t t)
  **/
 int cmp_time(time_t file1, time_t file2)
 {
-	if (file2 > file1) {
-		if (file2 - file1 <= modify_window)
-			return 0;
+	double d = difftime(file1, file2);
+
+	if (d > modify_window)
+		return 1;
+	else if (d < -modify_window)
 		return -1;
-	}
-	if (file1 - file2 <= modify_window)
+	else
 		return 0;
-	return 1;
 }