diff --git a/include/llvm/Analysis/CallGraph.h b/include/llvm/Analysis/CallGraph.h
index f562a51db39..3a51b056550 100644
--- a/include/llvm/Analysis/CallGraph.h
+++ b/include/llvm/Analysis/CallGraph.h
@@ -151,6 +151,8 @@ public:
   ///
   void print(std::ostream &o, const Module *M) const;
 
+  // stub - dummy function, just ignore it
+  static void stub();
 private:
   //===---------------------------------------------------------------------
   // Implementation of CallGraph construction
@@ -282,4 +284,8 @@ template<> struct GraphTraits<const CallGraph*> :
   static nodes_iterator nodes_end  (const CallGraph *CG) { return CG->end(); }
 };
 
+// Make sure that any clients of this file link in PostDominators.cpp
+static IncludeFile
+CALLGRAPH_INCLUDE_FILE((void*)&CallGraph::stub);
+
 #endif
diff --git a/lib/Analysis/IPA/CallGraph.cpp b/lib/Analysis/IPA/CallGraph.cpp
index 59fd1a2705c..f5be91c8acf 100644
--- a/lib/Analysis/IPA/CallGraph.cpp
+++ b/lib/Analysis/IPA/CallGraph.cpp
@@ -316,3 +316,4 @@ Function *CallGraph::removeFunctionFromModule(CallGraphNode *CGN) {
   return F;
 }
 
+void CallGraph::stub() {}