diff --git a/source/documents/scripts/controllers.js.coffee b/source/documents/scripts/controllers.js.coffee
index 6b0eefb..20dddec 100644
--- a/source/documents/scripts/controllers.js.coffee
+++ b/source/documents/scripts/controllers.js.coffee
@@ -13,7 +13,7 @@ angular.module("sideBySide.controllers", [])
 .controller "ComparisonController", [
 	'$scope', 'poems', 'transformer'
 	($scope, poems, transformer) ->
-		$scope.$watchCollection () ->
+		$scope.$watch () ->
 			poems.active.length
 		, () ->
 			$scope.columns = poems.active.length