diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index 2b92d0ff..b909b39 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -129,14 +129,12 @@
   }
 
   // Determine what kind of file it is.
-  switch (sys::identifyFileType(StringRef(signature, 4))) {
-    case sys::Bitcode_FileType:
-      flags |= BitcodeFlag;
-      break;
-    default:
-      flags &= ~BitcodeFlag;
-      break;
-  }
+  if (sys::fs::identify_magic(StringRef(signature, 4)) ==
+      sys::fs::file_magic::bitcode)
+    flags |= BitcodeFlag;
+  else
+    flags &= ~BitcodeFlag;
+
   return false;
 }