diff --git a/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp b/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
index 076e5a0ce7b5..52a8f71ca34b 100644
--- a/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
@@ -76,7 +76,7 @@ class FilenameCache {
  public:
   const char *getFilename(MDNode *Scope) {
     std::string &Filename = Filenames[Scope];
-    if (Filename == NULL) {
+    if (Filename.empty()) {
       DIScope S(Scope);
       Filename = S.getFilename();
     }