diff --git a/src/include/utils/datetime.h b/src/include/utils/datetime.h
index d73cc8dcfe..3725a7370d 100644
--- a/src/include/utils/datetime.h
+++ b/src/include/utils/datetime.h
@@ -285,7 +285,7 @@ extern int DecodeISO8601Interval(char *str,
 					  int *dtype, struct pg_tm * tm, fsec_t *fsec);
 
 extern void DateTimeParseError(int dterr, const char *str,
-				   const char *datatype);
+				   const char *datatype) __attribute__((noreturn));
 
 extern int	DetermineTimeZoneOffset(struct pg_tm * tm, pg_tz *tzp);