diff --git a/include/my_time.h b/include/my_time.h
index b17bb5fe2b76b..54aef17fc0958 100644
--- a/include/my_time.h
+++ b/include/my_time.h
@@ -118,7 +118,7 @@ longlong number_to_datetime(longlong nr, ulong sec_part, MYSQL_TIME *time_res,
                             ulonglong flags, int *was_cut);
 
 static inline
-longlong double_to_datetime(double nr, MYSQL_TIME *ltime, uint flags, int *cut)
+longlong double_to_datetime(double nr, MYSQL_TIME *ltime, ulonglong flags, int *cut)
 {
   if (nr < 0 || nr > LONGLONG_MAX)
     nr= (double)LONGLONG_MAX;