diff --git a/ext/date/lib/timelib_structs.h b/ext/date/lib/timelib_structs.h
index c24f6ee74d0..4d6ed12a7fb 100644
--- a/ext/date/lib/timelib_structs.h
+++ b/ext/date/lib/timelib_structs.h
@@ -178,7 +178,7 @@ typedef struct timelib_error_container {
 typedef struct _timelib_tz_lookup_table {
 	char       *name;
 	int         type;
-	int         gmtoffset;
+	float       gmtoffset;
 	char       *full_tz_name;
 } timelib_tz_lookup_table;