Index: clang-tools-extra/trunk/clang-tidy/modernize/UseOverrideCheck.cpp
===================================================================
--- clang-tools-extra/trunk/clang-tidy/modernize/UseOverrideCheck.cpp
+++ clang-tools-extra/trunk/clang-tidy/modernize/UseOverrideCheck.cpp
@@ -38,11 +38,16 @@
                  File.end());
   SmallVector<Token, 16> Tokens;
   Token Tok;
+  int NestedParens = 0;
   while (!RawLexer.LexFromRawLexer(Tok)) {
-    if (Tok.is(tok::semi) || Tok.is(tok::l_brace))
+    if ((Tok.is(tok::semi) || Tok.is(tok::l_brace)) && NestedParens == 0)
       break;
     if (Sources.isBeforeInTranslationUnit(Range.getEnd(), Tok.getLocation()))
       break;
+    if (Tok.is(tok::l_paren))
+      ++NestedParens;
+    else if (Tok.is(tok::r_paren))
+      --NestedParens;
     if (Tok.is(tok::raw_identifier)) {
       IdentifierInfo &Info = Result.Context->Idents.get(StringRef(
           Sources.getCharacterData(Tok.getLocation()), Tok.getLength()));
Index: clang-tools-extra/trunk/test/clang-tidy/modernize-use-override.cpp
===================================================================
--- clang-tools-extra/trunk/test/clang-tidy/modernize-use-override.cpp
+++ clang-tools-extra/trunk/test/clang-tidy/modernize-use-override.cpp
@@ -12,6 +12,10 @@
 
 struct MUST_USE_RESULT MustUseResultObject {};
 
+struct IntPair {
+  int First, Second;
+};
+
 struct Base {
   virtual ~Base() {}
   virtual void a();
@@ -41,6 +45,8 @@
 
   virtual void ne() noexcept(false);
   virtual void t() throw();
+
+  virtual void il(IntPair);
 };
 
 struct SimpleCases : public Base {
@@ -221,6 +227,14 @@
   // CHECK-FIXES: {{^}}  void cv2() const volatile override // some comment
 };
 
+struct DefaultArguments : public Base {
+  // Tests for default arguments (with initializer lists).
+  // Make sure the override fix is placed after the argument list.
+  void il(IntPair p = {1, (2 + (3))}) {}
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: annotate this
+  // CHECK-FIXES: {{^}}  void il(IntPair p = {1, (2 + (3))}) override {}
+};
+
 struct Macros : public Base {
   // Tests for 'virtual' and 'override' being defined through macros. Basically
   // give up for now.