diff --git a/packages/cozy-scripts/utils/progress.js b/packages/cozy-scripts/utils/progress.js
index a7404f27e..10e560769 100644
--- a/packages/cozy-scripts/utils/progress.js
+++ b/packages/cozy-scripts/utils/progress.js
@@ -168,7 +168,8 @@ ProgressBar.prototype.render = function(tokens, force) {
   )
 
   /* add head to the complete string */
-  if (completeLength > 0) complete = complete.slice(0, -1) + this.chars.head
+  if (completeLength > 0)
+    complete = complete.slice(0, -this.chars.complete.length) + this.chars.head
 
   /* fill in the actual progress bar */
   str = str.replace(':bar', complete + incomplete)