diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index a01b002..633d86c 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -453,7 +453,7 @@
 // Methods to create new FileID's and instantiations.
 //===----------------------------------------------------------------------===//
 
-/// createFileID - Create a new fileID for the specified ContentCache and
+/// createFileID - Create a new FileID for the specified ContentCache and
 /// include position.  This works regardless of whether the ContentCache
 /// corresponds to a file or some other input source.
 FileID SourceManager::createFileID(const ContentCache *File,