diff --git a/xos/dmdot b/xos/dmdot
index 124c7cf..f438aad 100755
--- a/xos/dmdot
+++ b/xos/dmdot
@@ -22,7 +22,7 @@
     if arg.startswith("-"):
         output = arg
     else:
-        apps = [arg]
+        apps+= [arg]
 
 model_classes = []
 class_names = []