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-rw-r--r--ext/date/date_core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 84338c4eff8..73d0b553478 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -42,8 +42,8 @@
#define DAY_IN_SECONDS 86400
#define SECOND_IN_NANOSECONDS 1000000000
-#if (ULONG_MAX / DAY_IN_SECONDS) > SECOND_IN_NANOSECONDS
-#define DAY_IN_NANOSECONDS LONG2NUM(DAY_IN_SECONDS * SECOND_IN_NANOSECONDS)
+#if (LONG_MAX / DAY_IN_SECONDS) > SECOND_IN_NANOSECONDS
+#define DAY_IN_NANOSECONDS LONG2NUM((long)DAY_IN_SECONDS * SECOND_IN_NANOSECONDS)
#elif defined HAVE_LONG_LONG
#define DAY_IN_NANOSECONDS LL2NUM((LONG_LONG)DAY_IN_SECONDS * SECOND_IN_NANOSECONDS)
#else