diff --git a/lib/CodeGen/MachineFunctionAnalysis.cpp b/lib/CodeGen/MachineFunctionAnalysis.cpp
index 56294d9..f5febc5 100644
--- a/lib/CodeGen/MachineFunctionAnalysis.cpp
+++ b/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -24,7 +24,7 @@
 
 char MachineFunctionAnalysis::ID = 0;
 
-MachineFunctionAnalysis::MachineFunctionAnalysis(TargetMachine &tm,
+MachineFunctionAnalysis::MachineFunctionAnalysis(const TargetMachine &tm,
                                                  CodeGenOpt::Level OL) :
   FunctionPass(&ID), TM(tm), OptLevel(OL), MF(0) {
 }