diff --git a/include/llvm/CodeGen/MachineFunctionAnalysis.h b/include/llvm/CodeGen/MachineFunctionAnalysis.h
index 5f1ff56af94..d020a7b4c73 100644
--- a/include/llvm/CodeGen/MachineFunctionAnalysis.h
+++ b/include/llvm/CodeGen/MachineFunctionAnalysis.h
@@ -33,7 +33,7 @@ public:
   static char ID;
   explicit MachineFunctionAnalysis(TargetMachine &tm,
                                    CodeGenOpt::Level OL = CodeGenOpt::Default);
-
+  ~MachineFunctionAnalysis();
 
   MachineFunction &getMF() const { return *MF; }
   CodeGenOpt::Level getOptLevel() const { return OptLevel; }
diff --git a/lib/CodeGen/MachineFunctionAnalysis.cpp b/lib/CodeGen/MachineFunctionAnalysis.cpp
index 8b7dba8121d..ae9d5a99c04 100644
--- a/lib/CodeGen/MachineFunctionAnalysis.cpp
+++ b/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -29,6 +29,10 @@ MachineFunctionAnalysis::MachineFunctionAnalysis(TargetMachine &tm,
   FunctionPass(&ID), TM(tm), OptLevel(OL), MF(0) {
 }
 
+MachineFunctionAnalysis::~MachineFunctionAnalysis() {
+  assert(!MF && "MachineFunctionAnalysis left initialized!");
+}
+
 bool MachineFunctionAnalysis::runOnFunction(Function &F) {
   assert(!MF && "MachineFunctionAnalysis already initialized!");
   MF = new MachineFunction(&F, TM);