diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index 440e688..4c24d03 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -93,9 +93,11 @@
         << Entry->getName() << ErrorStr;
       Buffer.setInt(true);
     } else if (FileInfo.st_size != Entry->getSize() ||
-               FileInfo.st_mtime != Entry->getModificationTime()) {
-      // Check that the file's size and modification time is the same as 
-      // in the file entry (which may have come from a stat cache).
+               FileInfo.st_mtime != Entry->getModificationTime() ||
+               FileInfo.st_ino != Entry->getInode()) {
+      // Check that the file's size, modification time, and inode are
+      // the same as in the file entry (which may have come from a
+      // stat cache).
       Diag.Report(diag::err_file_modified) << Entry->getName();
       Buffer.setInt(true);
     }