diff --git a/include/linux/license.h b/include/linux/license.h
index 7cce390f120b4f44a4fd1d8aff2b95d714a6890e..ad937f57f2cbb0095b6ae290e9a031166b5d59d6 100644
--- a/include/linux/license.h
+++ b/include/linux/license.h
@@ -2,6 +2,8 @@
 #ifndef __LICENSE_H
 #define __LICENSE_H
 
+#include <linux/string.h>
+
 static inline int license_is_gpl_compatible(const char *license)
 {
 	return (strcmp(license, "GPL") == 0