diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h
index 68189c4a2eb11fec5e12c196b9b761f41dc1aede..4ba39e1403b2528e3d5af72246598fb4c376cb90 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;