diff --git a/mozilla-build-arm.patch b/mozilla-build-arm.patch
index 774147b..fd54f93 100644
--- a/mozilla-build-arm.patch
+++ b/mozilla-build-arm.patch
@@ -22,3 +22,18 @@ diff -up firefox-46.0/media/webrtc/trunk/webrtc/build/common.gypi.arm firefox-46
        }],
        ['os_bsd==1', {
          'defines': [
+diff -up firefox-51.0/gfx/skia/skia/include/core/SkPreConfig.h.old firefox-51.0/gfx/skia/skia/include/core/SkPreConfig.h
+--- firefox-51.0/gfx/skia/skia/include/core/SkPreConfig.h.old	2017-01-20 10:22:48.921666380 +0100
++++ firefox-51.0/gfx/skia/skia/include/core/SkPreConfig.h	2017-01-20 10:23:23.600486691 +0100
+@@ -208,6 +208,10 @@
+     #define SK_ARM_HAS_NEON
+ #endif
+ 
++#if defined(__aarch64__)
++    #undef SK_ARM_HAS_NEON
++#endif
++
+ //////////////////////////////////////////////////////////////////////
+ 
+ #if !defined(SKIA_IMPLEMENTATION)
+diff -up firefox-51.0/media/webrtc/trunk/Makefile.old firefox-51.0/media/webrtc/trunk/Makefile