diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index b4fe80caff6..c5adc5000db 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -132,7 +132,7 @@ namespace llvm {
 
 std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
                                                         const SelectionDAG *G) {
-  DOTGraphTraits<SelectionDAG*>::getSimpleNodeLabel (Node, G);
+  return DOTGraphTraits<SelectionDAG*>::getSimpleNodeLabel (Node, G);
 }
 
 
diff --git a/lib/CompilerDriver/CompilationGraph.cpp b/lib/CompilerDriver/CompilationGraph.cpp
index 5781cdad906..3e6e050d686 100644
--- a/lib/CompilerDriver/CompilationGraph.cpp
+++ b/lib/CompilerDriver/CompilationGraph.cpp
@@ -471,6 +471,7 @@ namespace llvm {
   struct DOTGraphTraits<llvmc::CompilationGraph*>
     : public DefaultDOTGraphTraits
   {
+    DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
 
     template<typename GraphType>
     static std::string getNodeLabel(const Node* N, const GraphType&)