diff --git a/webrtc/modules/audio_conference_mixer/BUILD.gn b/webrtc/modules/audio_conference_mixer/BUILD.gn
index c27d184635..a94d005215 100644
--- a/webrtc/modules/audio_conference_mixer/BUILD.gn
+++ b/webrtc/modules/audio_conference_mixer/BUILD.gn
@@ -7,7 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 config("internal_config") {
-  visibility = ":*"  # Only targets in this file can depend on this.
+  visibility = [ ":*" ]  # Only targets in this file can depend on this.
   include_dirs = [
     "interface",
     "../interface",
diff --git a/webrtc/modules/media_file/BUILD.gn b/webrtc/modules/media_file/BUILD.gn
index 4e0cac6b5b..6f49dcd9f9 100644
--- a/webrtc/modules/media_file/BUILD.gn
+++ b/webrtc/modules/media_file/BUILD.gn
@@ -9,7 +9,7 @@
 import("../../build/webrtc.gni")
 
 config("internal_config") {
-  visibility = ":*"  # Only targets in this file can depend on this.
+  visibility = [ ":*" ]  # Only targets in this file can depend on this.
   include_dirs = [
     "interface",
     "../interface",