diff --git a/src/lime/tools/ConfigData.hx b/src/lime/tools/ConfigData.hx
index b6cafa33b..8e8ab7d12 100644
--- a/src/lime/tools/ConfigData.hx
+++ b/src/lime/tools/ConfigData.hx
@@ -373,7 +373,7 @@ abstract ConfigData(Dynamic) to Dynamic from Dynamic
 		}
 	}
 
-	public function push(id:String, value:Dynamic):Void
+	public function push(id:String, value:Dynamic, ?unique:Bool = false):Void
 	{
 		var tree = id.split(".");
 		var current = this;
@@ -399,13 +399,18 @@ abstract ConfigData(Dynamic) to Dynamic from Dynamic
 
 		if (Reflect.hasField(current, field))
 		{
-			if (!Reflect.hasField(current, field + ARRAY))
+			var array:Array<Dynamic> = Reflect.field(current, field + ARRAY);
+
+			if (array == null)
 			{
-				Reflect.setField(current, field + ARRAY, Reflect.hasField(current, field) ? [ObjectTools.deepCopy(Reflect.field(current, field))] : []);
+				array = [ObjectTools.deepCopy(Reflect.field(current, field))];
+				Reflect.setField(current, field + ARRAY, array);
 			}
 
-			var array:Array<Dynamic> = Reflect.field(current, field + ARRAY);
-			array.push(value);
+			if (array.indexOf(value) == -1)
+			{
+				array.push(value);
+			}
 		}
 
 		Reflect.setField(current, field, value);
diff --git a/src/lime/tools/ProjectXMLParser.hx b/src/lime/tools/ProjectXMLParser.hx
index 6f6bc7dc1..611b4c6a7 100644
--- a/src/lime/tools/ProjectXMLParser.hx
+++ b/src/lime/tools/ProjectXMLParser.hx
@@ -1797,21 +1797,8 @@ class ProjectXMLParser extends HXProject
 								case "install-location":
 									config.set("android.install-location", value);
 
-								case "extension":
-									var extensions = config.getArrayString("android.extension");
-
-									if (extensions == null || extensions.indexOf(value) == -1)
-									{
-										config.push("android.extension", value);
-									}
-
-								case "permission":
-									var permissions = config.getArrayString("android.permission");
-
-									if (permissions == null || permissions.indexOf(value) == -1)
-									{
-										config.push("android.permission", value);
-									}
+								case "extension", "permission":
+									config.push("android." + name, value, true);
 
 								case "gradle-version":
 									config.set("android.gradle-version", value);