diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index d3c4fb1d7ca..b535b3e6e94 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -274,11 +274,11 @@ unsigned MCContext::GetDwarfFile(StringRef Directory, StringRef FileName,
 
   if (Directory.empty()) {
     // Separate the directory part from the basename of the FileName.
-    std::pair<StringRef, StringRef> Slash = FileName.rsplit('/');
-    Directory = Slash.second;
-    if (!Directory.empty()) {
-      Directory = Slash.first;
-      FileName = Slash.second;
+    StringRef tFileName = sys::path::filename(FileName);
+    if (!tFileName.empty()) {
+      Directory = sys::path::parent_path(FileName);
+      if (!Directory.empty())
+        FileName = sys::path::filename(FileName);
     }
   }