diff --git a/racket/src/racket/src/fun.c b/racket/src/racket/src/fun.c
index bf8589cd2a..d5d7a79156 100644
--- a/racket/src/racket/src/fun.c
+++ b/racket/src/racket/src/fun.c
@@ -9875,6 +9875,8 @@ static int is_day_before(SYSTEMTIME *a, SYSTEMTIME *b)
 
   if (a->wDay < doc)
     return 1;
+  if (a->wDay > doc)
+    return 0;
 
   dtxCOMP(wHour);
   dtxCOMP(wMinute);