diff --git a/kernel/time/time.c b/kernel/time/time.c
index 121faa2..4923dd5 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -69,7 +69,7 @@ void time_get(Time *time) {
 }
 
 bool time_isleap(uint32_t y) {
-  return ((y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0));
+  return (((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0));
 }
 
 const uint16_t days_before_month[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };