diff --git a/echo.c b/echo.c
index fb7e3dd..0035e66 100644
--- a/echo.c
+++ b/echo.c
@@ -2,7 +2,6 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include "util.h"
 
 static void