diff --git a/python/ycm/vimsupport.py b/python/ycm/vimsupport.py
index 92d759b9..7c529169 100644
--- a/python/ycm/vimsupport.py
+++ b/python/ycm/vimsupport.py
@@ -158,7 +158,7 @@ def BufferIsVisible( buffer_number ):
 
 def GetBufferFilepath( buffer_object ):
   if buffer_object.name:
-    return ToUnicode( buffer_object.name )
+    return os.path.normpath( ToUnicode( buffer_object.name ) )
   # Buffers that have just been created by a command like :enew don't have any
   # buffer name so we use the buffer number for that.
   return os.path.join( GetCurrentDirectory(), str( buffer_object.number ) )