diff --git a/cmd/echo.c b/cmd/echo.c
index 973213a..d134650 100644
--- a/cmd/echo.c
+++ b/cmd/echo.c
@@ -5,6 +5,7 @@
  */
 
 #include <command.h>
+#include <linux/string.h>
 
 static int do_echo(struct cmd_tbl *cmdtp, int flag, int argc,
 		   char *const argv[])