diff --git a/src/display-buffer.coffee b/src/display-buffer.coffee
index 8aa6e9d1b..910f7b177 100644
--- a/src/display-buffer.coffee
+++ b/src/display-buffer.coffee
@@ -89,13 +89,14 @@ class DisplayBuffer extends Model
     scrollTop: @scrollTop
     scrollLeft: @scrollLeft
     tokenizedBuffer: @tokenizedBuffer.serialize()
+    largeFileMode: @largeFileMode
 
   deserializeParams: (params) ->
     params.tokenizedBuffer = TokenizedBuffer.deserialize(params.tokenizedBuffer)
     params
 
   copy: ->
-    newDisplayBuffer = new DisplayBuffer({@buffer, tabLength: @getTabLength()})
+    newDisplayBuffer = new DisplayBuffer({@buffer, tabLength: @getTabLength(), @largeFileMode})
     newDisplayBuffer.setScrollTop(@getScrollTop())
     newDisplayBuffer.setScrollLeft(@getScrollLeft())
 
diff --git a/src/tokenized-buffer.coffee b/src/tokenized-buffer.coffee
index f051cb4be..6337aa3c6 100644
--- a/src/tokenized-buffer.coffee
+++ b/src/tokenized-buffer.coffee
@@ -44,6 +44,7 @@ class TokenizedBuffer extends Model
     bufferPath: @buffer.getPath()
     tabLength: @tabLength
     ignoreInvisibles: @ignoreInvisibles
+    largeFileMode: @largeFileMode
 
   deserializeParams: (params) ->
     params.buffer = atom.project.bufferForPathSync(params.bufferPath)