diff --git a/pkg/systemd/terminal.jsx b/pkg/systemd/terminal.jsx
index c0c2c63424b7..eb8faf07a6f4 100644
--- a/pkg/systemd/terminal.jsx
+++ b/pkg/systemd/terminal.jsx
@@ -150,6 +150,7 @@ const _ = cockpit.gettext;
                                     </ToolbarItem>
                                     <ToolbarItem>
                                         <NumberInput
+                                            inputProps={{ readOnlyVariant: 'default' }} // HACK for https://github.com/patternfly/patternfly-react/issues/9311
                                             className="font-size"
                                             value={this.state.size}
                                             min={this.minSize}