diff --git a/tools/llvm-prof/llvm-prof.cpp b/tools/llvm-prof/llvm-prof.cpp
index f88f1fc..c85b0da 100644
--- a/tools/llvm-prof/llvm-prof.cpp
+++ b/tools/llvm-prof/llvm-prof.cpp
@@ -117,7 +117,7 @@
 
     // Read in the bytecode file...
     std::string ErrorMessage;
-    Module *M;
+    Module *M = 0;
     if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(BytecodeFile,
                                                             &ErrorMessage)) {
       M = ParseBitcodeFile(Buffer, &ErrorMessage);