diff --git a/src/dawn/common/BUILD.gn b/src/dawn/common/BUILD.gn
index ef8400cbff..f46d108747 100644
--- a/src/dawn/common/BUILD.gn
+++ b/src/dawn/common/BUILD.gn
@@ -115,6 +115,7 @@ config("internal_config") {
       "-Wdeprecated-copy",
       "-Wdeprecated-copy-dtor",
       "-Wduplicate-enum",
+      "-Wextra-semi",
       "-Wextra-semi-stmt",
       "-Wimplicit-fallthrough",
       "-Winconsistent-missing-destructor-override",
diff --git a/src/dawn/native/metal/BackendMTL.mm b/src/dawn/native/metal/BackendMTL.mm
index fdd27bf223..acba1a935c 100644
--- a/src/dawn/native/metal/BackendMTL.mm
+++ b/src/dawn/native/metal/BackendMTL.mm
@@ -406,7 +406,7 @@ class Adapter : public AdapterBase {
         if (mDeviceId != 0) {
             mArchitectureName = gpu_info::GetArchitectureName(mVendorId, mDeviceId);
         }
-    };
+    }
 
     enum class MTLGPUFamily {
         Apple1,