diff --git a/ui (gen4)/features/alias.js b/ui (gen4)/features/alias.js
index a00dd3c3..2ee0e1fa 100755
--- a/ui (gen4)/features/alias.js	
+++ b/ui (gen4)/features/alias.js	
@@ -33,7 +33,9 @@ module.Alias = core.ImageGridFeatures.Feature({
 			function(_, alias, target){
 				console.log(alias, target)
 				// remove alias...
-				if(target === null || target === false){
+				// XXX is this test enough??? ...see ActionSet.alias(..)
+				if(arguments.length == 3 
+						&& (target === null || target === false)){
 					var aliases = this.config.aliases || {}
 
 					delete aliases[alias]
diff --git a/ui (gen4)/package.json b/ui (gen4)/package.json
index 1f7b17a6..cb73c321 100755
--- a/ui (gen4)/package.json	
+++ b/ui (gen4)/package.json	
@@ -22,7 +22,7 @@
     "fs-walk": "^0.0.1",
     "glob": "^4.0.6",
     "guarantee-events": "^1.0.0",
-    "ig-actions": "^3.5.1",
+    "ig-actions": "^3.5.2",
     "ig-features": "^3.2.6",
     "ig-object": "^1.0.1",
     "openseadragon": "^2.3.0",