diff --git a/du4/program.c b/du4/program.c
index dd0a22e..dd58455 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -1,4 +1,4 @@
-nclude<stdio.h>
+#include<stdio.h>
 #include<string.h>
 #include<time.h>
 #include<stdlib.h>