diff --git a/package/kernel/mac80211/Makefile b/package/kernel/mac80211/Makefile
index f2279180df..5745839d15 100644
--- a/package/kernel/mac80211/Makefile
+++ b/package/kernel/mac80211/Makefile
@@ -11,7 +11,7 @@ include $(INCLUDE_DIR)/kernel.mk
 PKG_NAME:=mac80211
 
 PKG_VERSION:=5.7-rc3-1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_SOURCE_URL:=@KERNEL/linux/kernel/projects/backports/stable/v5.7-rc3/
 PKG_HASH:=7bc785c932f011c65adb75ffa746be2fa90b16ab61a6e1fd883acee403ffeed1
 
diff --git a/package/kernel/mac80211/patches/subsys/090-wireless-Use-linux-stddef.h-instead-of-stddef.h.patch b/package/kernel/mac80211/patches/subsys/090-wireless-Use-linux-stddef.h-instead-of-stddef.h.patch
new file mode 100644
index 0000000000..c81cc063c6
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/090-wireless-Use-linux-stddef.h-instead-of-stddef.h.patch
@@ -0,0 +1,31 @@
+From e1f04bf9d38633f0bf9d041089366fea0ad22623 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Thu, 21 May 2020 19:50:05 +0200
+Subject: [PATCH] wireless: Use linux/stddef.h instead of stddef.h
+
+When compiling inside the kernel include linux/stddef.h instead of
+stddef.h. When I compile this header file in backports for power PC I
+run into a conflict with ptrdiff_t. I was unable to reproduce this in
+mainline kernel. I still would like to fix this problem in the kernel.
+
+Fixes: 6989310f5d43 ("wireless: Use offsetof instead of custom macro.")
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/wireless.h | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/wireless.h
++++ b/include/uapi/linux/wireless.h
+@@ -74,7 +74,11 @@
+ #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
+ #include <linux/if.h>			/* for IFNAMSIZ and co... */
+ 
+-#include <stddef.h>                     /* for offsetof */
++#ifdef __KERNEL__
++#	include <linux/stddef.h>	/* for offsetof */
++#else
++#	include <stddef.h>		/* for offsetof */
++#endif
+ 
+ /***************************** VERSION *****************************/
+ /*