diff --git a/utils/fpcmp/fpcmp.cpp b/utils/fpcmp/fpcmp.cpp
index d7808dd6f00..cdaf95de61e 100644
--- a/utils/fpcmp/fpcmp.cpp
+++ b/utils/fpcmp/fpcmp.cpp
@@ -33,8 +33,8 @@ int main(int argc, char **argv) {
   cl::ParseCommandLineOptions(argc, argv);
 
   std::string ErrorMsg;
-  int DF = DiffFilesWithTolerance(File1, File2, AbsTolerance, RelTolerance,
-                                  &ErrorMsg);
+  int DF = DiffFilesWithTolerance(sys::Path(File1), sys::Path(File2),
+                                  AbsTolerance, RelTolerance, &ErrorMsg);
   if (!ErrorMsg.empty())
     std::cerr << argv[0] << ": " << ErrorMsg << "\n";
   return DF;