diff --git a/src/tokenized-buffer.coffee b/src/tokenized-buffer.coffee
index 3bbef3c4d..a79e37493 100644
--- a/src/tokenized-buffer.coffee
+++ b/src/tokenized-buffer.coffee
@@ -242,6 +242,16 @@ class TokenizedBuffer extends Model
         row + delta
 
   handleBufferChange: (e) ->
+    if @lastBufferChangeEventId?
+      @assert(
+        @lastBufferChangeEventId is e.eventId - 1,
+        'Buffer Change Event Ids are not sequential',
+        (error) =>
+          error.metadata = {
+            tokenizedBufferEventId: @lastBufferChangeEventId,
+            nextTokenizedBufferEventId: e.eventId,
+          }
+      )
     @lastBufferChangeEventId = e.eventId
     @changeCount = @buffer.changeCount