diff --git a/sw/lib/ocaml/papget_renderer.ml b/sw/lib/ocaml/papget_renderer.ml
index e2e01e16a0..6bc949e25f 100644
--- a/sw/lib/ocaml/papget_renderer.ml
+++ b/sw/lib/ocaml/papget_renderer.ml
@@ -171,9 +171,9 @@ class canvas_gauge = fun ?(config=[]) canvas_group x y ->
   (*let props = (text_props@[`ANCHOR `EAST]) in*)
 
   let _ = GnoCanvas.ellipse ~x1:r2 ~y1:r2 ~x2:(-.r2) ~y2:(-.r2)
-    ~props:[`NO_FILL_COLOR; `OUTLINE_COLOR "grey"; `WIDTH_UNITS 6.]  root in
+    ~props:[`NO_FILL_COLOR; `OUTLINE_COLOR "grey"; `WIDTH_PIXELS 6]  root in
   let points = [|0.;-.r1;0.;-.r1+.3.|] in
-  let props = [`WIDTH_UNITS 2.; `FILL_COLOR "red"] in
+  let props = [`WIDTH_PIXELS 2; `FILL_COLOR "red"] in
   let _ = GnoCanvas.line ~points ~props root in
   let il = GnoCanvas.line ~points ~props root in
   let () = il#affine_absolute (affine_pos_and_angle 0. 0. (-. Latlong.pi /. 3.)) in