diff --git a/srcpkgs/thunderbird/patches/thunderbird-31.6.0-libvpx-modern.patch b/srcpkgs/thunderbird/patches/thunderbird-31.6.0-libvpx-modern.patch
new file mode 100644
index 00000000000..493e4118233
--- /dev/null
+++ b/srcpkgs/thunderbird/patches/thunderbird-31.6.0-libvpx-modern.patch
@@ -0,0 +1,24 @@
+--- mozilla/media/webrtc/trunk/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc.modern	2015-04-07 14:30:05.525960513 -0400
++++ mozilla/media/webrtc/trunk/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc	2015-04-07 14:32:22.478199058 -0400
+@@ -180,7 +180,7 @@ int VP8EncoderImpl::InitEncode(const Vid
+   // Creating a wrapper to the image - setting image data to NULL. Actual
+   // pointer will be set in encode. Setting align to 1, as it is meaningless
+   // (actual memory is not allocated).
+-  raw_ = vpx_img_wrap(NULL, IMG_FMT_I420, codec_.width, codec_.height,
++  raw_ = vpx_img_wrap(NULL, VPX_IMG_FMT_I420, codec_.width, codec_.height,
+                       1, NULL);
+   // populate encoder configuration with default values
+   if (vpx_codec_enc_config_default(vpx_codec_vp8_cx(), config_, 0)) {
+@@ -349,9 +349,9 @@ int VP8EncoderImpl::Encode(const I420Vid
+   }
+   // Image in vpx_image_t format.
+   // Input image is const. VP8's raw image is not defined as const.
+-  raw_->planes[PLANE_Y] = const_cast<uint8_t*>(input_image.buffer(kYPlane));
+-  raw_->planes[PLANE_U] = const_cast<uint8_t*>(input_image.buffer(kUPlane));
+-  raw_->planes[PLANE_V] = const_cast<uint8_t*>(input_image.buffer(kVPlane));
++  raw_->planes[VPX_PLANE_Y] = const_cast<uint8_t*>(input_image.buffer(kYPlane));
++  raw_->planes[VPX_PLANE_U] = const_cast<uint8_t*>(input_image.buffer(kUPlane));
++  raw_->planes[VPX_PLANE_V] = const_cast<uint8_t*>(input_image.buffer(kVPlane));
+   // TODO(mikhal): Stride should be set in initialization.
+   raw_->stride[VPX_PLANE_Y] = input_image.stride(kYPlane);
+   raw_->stride[VPX_PLANE_U] = input_image.stride(kUPlane);