diff --git a/lib/ace/autocomplete.js b/lib/ace/autocomplete.js
index c5109ae1..8bf3a401 100644
--- a/lib/ace/autocomplete.js
+++ b/lib/ace/autocomplete.js
@@ -206,7 +206,7 @@ var Autocomplete = function() {
                 callback(null, {
                     prefix: prefix,
                     matches: matches,
-                    left: total - (i + 1)
+                    finished: (--total === 0)
                 });
             });
         });
@@ -255,8 +255,9 @@ var Autocomplete = function() {
         // Save current gatherCompletions session, session is close when a match is insert
         var _id = this.gatherCompletionsId;
         this.gatherCompletions(this.editor, function(err, results) {
+            // Only detach if result gathering is finished
             var doDetach = function() {
-                if (results.left > 0) return;
+                if (!results.finished) return;
                 return this.detach();
             }.bind(this);