diff --git a/lib/Support/VirtualFileSystem.cpp b/lib/Support/VirtualFileSystem.cpp
index ac10baa..c390cb1 100644
--- a/lib/Support/VirtualFileSystem.cpp
+++ b/lib/Support/VirtualFileSystem.cpp
@@ -1764,7 +1764,7 @@
 RedirectingFileSystem::openFileForRead(const Twine &Path) {
   ErrorOr<RedirectingFileSystem::Entry *> E = lookupPath(Path);
   if (!E) {
-    if (shouldUseExternalFS() &
+    if (shouldUseExternalFS() &&
         E.getError() == llvm::errc::no_such_file_or_directory) {
       return ExternalFS->openFileForRead(Path);
     }