diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 700929154cc77..ade06bc5502fb 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -50,7 +50,11 @@ static inline long long php_date_llabs( long long i ) { return i >= 0 ? i : -i;
 		int st = snprintf(s, len, "%lld", i); \
 		s[st] = '\0'; \
 	} while (0);
-# define DATE_A64I(i, s) i = atoll(s)
+# if defined(HAVE_STRTOLL)
+#  define DATE_A64I(i, s) i = strtoll(s, NULL, 10)
+# else
+#  define DATE_A64I(i, s) i = strtol(s, NULL, 10)
+# endif
 #endif
 
 /* {{{ arginfo */