diff --git a/src/browser/base/content/zen-styles/zen-compact-mode.css b/src/browser/base/content/zen-styles/zen-compact-mode.css
index 512f13725..a476e04d4 100644
--- a/src/browser/base/content/zen-styles/zen-compact-mode.css
+++ b/src/browser/base/content/zen-styles/zen-compact-mode.css
@@ -114,6 +114,8 @@
         background: var(--zen-dialog-background);
         outline: 1px solid var(--zen-colors-border-contrast);
         outline-offset: -1px;
+        min-width: var(--zen-toolbox-min-width);
+
         /* times 4 because we have the inner padding and the outter padding to consider */
         :root[zen-sidebar-expanded='true'] & {
           width: calc(var(--zen-sidebar-width) - var(--zen-toolbox-padding));