diff --git a/scripts/mve.py b/scripts/mve.py
index 2789f70b..fcbb3a46 100644
--- a/scripts/mve.py
+++ b/scripts/mve.py
@@ -65,7 +65,7 @@ class ODMMveCell(ecto.Cell):
 
             # config
             config = [
-                "-s %s" % self.params.output_scale
+                "-s%s" % self.params.output_scale
             ]
 
             # run mve