diff --git a/webrtc/BUILD.gn b/webrtc/BUILD.gn
index 3ae09da2c9..b31a07c83d 100644
--- a/webrtc/BUILD.gn
+++ b/webrtc/BUILD.gn
@@ -117,6 +117,7 @@ config("common_config") {
       cflags += [
         "-Wimplicit-fallthrough",
         "-Wthread-safety",
+        "-Winconsistent-missing-override",
       ]
     }
   }
diff --git a/webrtc/build/common.gypi b/webrtc/build/common.gypi
index f8446d9f91..5335cc8b16 100644
--- a/webrtc/build/common.gypi
+++ b/webrtc/build/common.gypi
@@ -313,6 +313,7 @@
             'cflags': [
               '-Wimplicit-fallthrough',
               '-Wthread-safety',
+              '-Winconsistent-missing-override',
             ],
           }],
         ],