diff --git a/llvm/tools/llvm-pdbutil/InputFile.cpp b/llvm/tools/llvm-pdbutil/InputFile.cpp
index 8319fc5..3695cbf 100644
--- a/llvm/tools/llvm-pdbutil/InputFile.cpp
+++ b/llvm/tools/llvm-pdbutil/InputFile.cpp
@@ -279,7 +279,7 @@
         formatv("File {0} is not a supported file type", Path),
         inconvertibleErrorCode());
 
-  auto Result = MemoryBuffer::getFile(Path, -1i64, false);
+  auto Result = MemoryBuffer::getFile(Path, -1LL, false);
   if (!Result)
     return make_error<StringError>(
         formatv("File {0} could not be opened", Path), Result.getError());