Index: clang-tools-extra/trunk/clang-tidy/modernize/UseDefaultCheck.cpp
===================================================================
--- clang-tools-extra/trunk/clang-tidy/modernize/UseDefaultCheck.cpp
+++ clang-tools-extra/trunk/clang-tidy/modernize/UseDefaultCheck.cpp
@@ -238,7 +238,7 @@
             isDefinition(),
             anyOf(
                 // Default constructor.
-                allOf(unless(hasAnyConstructorInitializer(anything())),
+                allOf(unless(hasAnyConstructorInitializer(isWritten())),
                       parameterCountIs(0)),
                 // Copy constructor.
                 allOf(isCopyConstructor(),
@@ -296,12 +296,12 @@
       if (!isCopyConstructorAndCanBeDefaulted(Result.Context, Ctor))
         return;
       SpecialFunctionName = "copy constructor";
-    }
-    // If there are constructor initializers, they must be removed.
-    if (Ctor->getNumCtorInitializers() != 0) {
-      StartLoc = getColonLoc(Result.Context, Ctor);
-      if (!StartLoc.isValid())
-        return;
+      // If there are constructor initializers, they must be removed.
+      if (Ctor->getNumCtorInitializers() != 0) {
+        StartLoc = getColonLoc(Result.Context, Ctor);
+        if (!StartLoc.isValid())
+          return;
+      }
     }
   } else if (isa<CXXDestructorDecl>(SpecialFunctionDecl)) {
     SpecialFunctionName = "destructor";
Index: clang-tools-extra/trunk/test/clang-tidy/modernize-use-default.cpp
===================================================================
--- clang-tools-extra/trunk/test/clang-tidy/modernize-use-default.cpp
+++ clang-tools-extra/trunk/test/clang-tidy/modernize-use-default.cpp
@@ -43,6 +43,24 @@
   int Field;
 };
 
+// Default member initializer
+class DMI {
+public:
+  DMI() {}
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use '= default'
+  // CHECK-FIXES: DMI() = default;
+  int Field = 5;
+};
+
+// Class member
+class CM {
+public:
+  CM() {}
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use '= default'
+  // CHECK-FIXES: CM() = default;
+  OL o;
+};
+
 // Private constructor/destructor.
 class Priv {
   Priv() {}