1 files changed, 1 insertions, 1 deletions
diff --git a/date.c b/date.c
index 17385a9b62..002aa3c8d6 100644
--- a/date.c
+++ b/date.c
@@ -9,7 +9,7 @@
 /*
  * This is like mktime, but without normalization of tm_wday and tm_yday.
  */
-time_t tm_to_time_t(const struct tm *tm)
+static time_t tm_to_time_t(const struct tm *tm)
 {
 	static const int mdays[] = {
 	    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334