diff --git a/llvm/lib/Support/SourceMgr.cpp b/llvm/lib/Support/SourceMgr.cpp
index fac3cad..4f650b4 100644
--- a/llvm/lib/Support/SourceMgr.cpp
+++ b/llvm/lib/Support/SourceMgr.cpp
@@ -65,7 +65,7 @@
     MemoryBuffer::getFile(IncludedFile.c_str(), NewBuf);
   }
 
-  if (NewBuf == 0) return ~0U;
+  if (!NewBuf) return ~0U;
 
   return AddNewSourceBuffer(NewBuf.take(), IncludeLoc);
 }