diff --git a/package/kernel/mac80211/patches/070-add-missing-header.patch b/package/kernel/mac80211/patches/070-add-missing-header.patch
new file mode 100644
index 0000000000..9307804a07
--- /dev/null
+++ b/package/kernel/mac80211/patches/070-add-missing-header.patch
@@ -0,0 +1,10 @@
+--- a/compat/backport-3.15.c
++++ b/compat/backport-3.15.c
+@@ -11,6 +11,7 @@
+ #include <linux/kernel.h>
+ #include <linux/device.h>
+ #include <linux/of.h>
++#include <linux/string.h>
+ 
+ /**
+  * devm_kstrdup - Allocate resource managed space and