diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h
index 68189c4a2eb1..4ba39e1403b2 100644
--- a/include/linux/string_helpers.h
+++ b/include/linux/string_helpers.h
@@ -4,6 +4,7 @@
 
 #include <linux/bits.h>
 #include <linux/ctype.h>
+#include <linux/string.h>
 #include <linux/types.h>
 
 struct file;