diff --git a/printed/ribbon_clamp.scad b/printed/ribbon_clamp.scad
index 4b2e9b4..19ae83c 100644
--- a/printed/ribbon_clamp.scad
+++ b/printed/ribbon_clamp.scad
@@ -81,7 +81,7 @@ module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of
     }
 }
 
-module ribbon_clamp_assembly(ways, screw) pose([55, 180, 25])  //! Printed part with inserts in place
+module ribbon_clamp_assembly(ways, screw = screw) pose([55, 180, 25])  //! Printed part with inserts in place
     assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : "")) {
     h = ribbon_clamp_height(screw);
     insert = screw_insert(screw);
diff --git a/readme.md b/readme.md
index 188cd1a..30f2137 100644
--- a/readme.md
+++ b/readme.md
@@ -5137,7 +5137,7 @@ Clamp for ribbon cable and polypropylene strip.
 | Module | Description |
 |:--- |:--- |
 | ```ribbon_clamp(ways, screw = screw)``` | Generate STL for given number of ways |
-| ```ribbon_clamp_assembly(ways, screw)``` | Printed part with inserts in place |
+| ```ribbon_clamp_assembly(ways, screw = screw)``` | Printed part with inserts in place |
 | ```ribbon_clamp_fastened_assembly(ways, thickness, screw = screw)``` | Clamp with fasteners in place |
 | ```ribbon_clamp_hole_positions(ways, screw = screw, side = undef)``` | Place children at hole positions |
 | ```ribbon_clamp_holes(ways, h = 20, screw = screw)``` | Drill screw holes |