1 files changed, 1 insertions, 0 deletions
diff --git a/cat.h b/cat.h
index c8db240..2a2e494 100644
--- a/cat.h
+++ b/cat.h
@@ -7,6 +7,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>