diff --git a/cmd/cache.c b/cmd/cache.c
index 3049f5c..b700787 100644
--- a/cmd/cache.c
+++ b/cmd/cache.c
@@ -10,6 +10,7 @@
 #include <command.h>
 #include <cpu_func.h>
 #include <linux/compiler.h>
+#include <linux/string.h>
 
 static int parse_argv(const char *);