diff --git a/firmware/libc/mktime.c b/firmware/libc/mktime.c
index eaa017122a..822f12e6e8 100644
--- a/firmware/libc/mktime.c
+++ b/firmware/libc/mktime.c
@@ -40,7 +40,6 @@ time_t mktime(struct tm *t)
         year -= 1;
         month += 12;
     }
-    result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month];
     result = (year - 1970) * 365 + m_to_d[month];
     if (month <= 1)
         year -= 1;