diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index a6fa96c..49d39a9 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -274,6 +274,12 @@
   visibility = [ "*" ]
   sources = [
     "codecs/h264/h264.cc",
+    "codecs/h264/h264_color_space.cc",
+    "codecs/h264/h264_color_space.h",
+    "codecs/h264/h264_decoder_impl.cc",
+    "codecs/h264/h264_decoder_impl.h",
+    "codecs/h264/h264_encoder_impl.cc",
+    "codecs/h264/h264_encoder_impl.h",
     "codecs/h264/include/h264.h",
   ]
 
@@ -285,6 +291,7 @@
     "../../api/video:video_frame_i010",
     "../../api/video:video_frame_i420",
     "../../api/video_codecs:video_codecs_api",
+    "../../common_video",
     "../../media:rtc_h264_profile_id",
     "../../media:rtc_media_base",
     "../../rtc_base",
@@ -299,21 +306,10 @@
   ]
 
   if (rtc_use_h264) {
-    assert(!(is_win && !is_clang), "See: bugs.webrtc.org/9213#c13.")
-    sources += [
-      "codecs/h264/h264_color_space.cc",
-      "codecs/h264/h264_color_space.h",
-      "codecs/h264/h264_decoder_impl.cc",
-      "codecs/h264/h264_decoder_impl.h",
-      "codecs/h264/h264_encoder_impl.cc",
-      "codecs/h264/h264_encoder_impl.h",
-    ]
     deps += [
-      "../../common_video",
       "//third_party/ffmpeg",
       "//third_party/openh264:encoder",
     ]
-
     if (!build_with_mozilla) {
       deps += [ "../../media:rtc_media_base" ]
     }
diff --git a/modules/video_coding/codecs/h264/h264_color_space.cc b/modules/video_coding/codecs/h264/h264_color_space.cc
index 2454c20..5992126 100644
--- a/modules/video_coding/codecs/h264/h264_color_space.cc
+++ b/modules/video_coding/codecs/h264/h264_color_space.cc
@@ -8,6 +8,11 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+// Everything declared/defined in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
 #include "modules/video_coding/codecs/h264/h264_color_space.h"
 
 namespace webrtc {
@@ -169,3 +174,5 @@
 }
 
 }  // namespace webrtc
+
+#endif  // WEBRTC_USE_H264
diff --git a/modules/video_coding/codecs/h264/h264_color_space.h b/modules/video_coding/codecs/h264/h264_color_space.h
index 5608ab1..392ccaf 100644
--- a/modules/video_coding/codecs/h264/h264_color_space.h
+++ b/modules/video_coding/codecs/h264/h264_color_space.h
@@ -11,6 +11,15 @@
 #ifndef MODULES_VIDEO_CODING_CODECS_H264_H264_COLOR_SPACE_H_
 #define MODULES_VIDEO_CODING_CODECS_H264_H264_COLOR_SPACE_H_
 
+// Everything declared in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
+#if defined(WEBRTC_WIN) && !defined(__clang__)
+#error "See: bugs.webrtc.org/9213#c13."
+#endif
+
 #include "api/video/color_space.h"
 
 extern "C" {
@@ -24,4 +33,6 @@
 
 }  // namespace webrtc
 
+#endif  // WEBRTC_USE_H264
+
 #endif  // MODULES_VIDEO_CODING_CODECS_H264_H264_COLOR_SPACE_H_
diff --git a/modules/video_coding/codecs/h264/h264_decoder_impl.cc b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
index 512b846..bc86a34 100644
--- a/modules/video_coding/codecs/h264/h264_decoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
@@ -9,6 +9,11 @@
  *
  */
 
+// Everything declared/defined in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
 #include "modules/video_coding/codecs/h264/h264_decoder_impl.h"
 
 #include <algorithm>
@@ -380,3 +385,5 @@
 }
 
 }  // namespace webrtc
+
+#endif  // WEBRTC_USE_H264
diff --git a/modules/video_coding/codecs/h264/h264_decoder_impl.h b/modules/video_coding/codecs/h264/h264_decoder_impl.h
index 5e66e07..711496a 100644
--- a/modules/video_coding/codecs/h264/h264_decoder_impl.h
+++ b/modules/video_coding/codecs/h264/h264_decoder_impl.h
@@ -12,6 +12,15 @@
 #ifndef MODULES_VIDEO_CODING_CODECS_H264_H264_DECODER_IMPL_H_
 #define MODULES_VIDEO_CODING_CODECS_H264_H264_DECODER_IMPL_H_
 
+// Everything declared in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
+#if defined(WEBRTC_WIN) && !defined(__clang__)
+#error "See: bugs.webrtc.org/9213#c13."
+#endif
+
 #include <memory>
 
 #include "modules/video_coding/codecs/h264/include/h264.h"
@@ -98,4 +107,6 @@
 
 }  // namespace webrtc
 
+#endif  // WEBRTC_USE_H264
+
 #endif  // MODULES_VIDEO_CODING_CODECS_H264_H264_DECODER_IMPL_H_
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.cc b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
index a8135bc..88b667c 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
@@ -9,6 +9,11 @@
  *
  */
 
+// Everything declared/defined in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
 #include "modules/video_coding/codecs/h264/h264_encoder_impl.h"
 
 #include <limits>
@@ -659,3 +664,5 @@
 }
 
 }  // namespace webrtc
+
+#endif  // WEBRTC_USE_H264
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.h b/modules/video_coding/codecs/h264/h264_encoder_impl.h
index 74592ef..09ca367 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.h
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.h
@@ -12,6 +12,15 @@
 #ifndef MODULES_VIDEO_CODING_CODECS_H264_H264_ENCODER_IMPL_H_
 #define MODULES_VIDEO_CODING_CODECS_H264_H264_ENCODER_IMPL_H_
 
+// Everything declared in this header is only required when WebRTC is
+// build with H264 support, please do not move anything out of the
+// #ifdef unless needed and tested.
+#ifdef WEBRTC_USE_H264
+
+#if defined(WEBRTC_WIN) && !defined(__clang__)
+#error "See: bugs.webrtc.org/9213#c13."
+#endif
+
 #include <memory>
 #include <vector>
 
@@ -104,4 +113,6 @@
 
 }  // namespace webrtc
 
+#endif  // WEBRTC_USE_H264
+
 #endif  // MODULES_VIDEO_CODING_CODECS_H264_H264_ENCODER_IMPL_H_