diff --git a/day3/p2.c b/day3/p2.c
index be9cf63..1018870 100644
--- a/day3/p2.c
+++ b/day3/p2.c
@@ -4,7 +4,6 @@
 #include <string.h>
 #include <stdint.h>
 #include <stdbool.h>
-#include <ctype.h>
 
 #define ISDIGIT(c) (c >= 0x30 && c <= 0x39)