diff --git a/cmd/cat.c b/cmd/cat.c
index 6828b7b..3167cda 100644
--- a/cmd/cat.c
+++ b/cmd/cat.c
@@ -8,6 +8,7 @@
 #include <fs.h>
 #include <malloc.h>
 #include <mapmem.h>
+#include <linux/errno.h>
 
 static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
 		  char *const argv[])