diff --git a/lisp/transient.el b/lisp/transient.el
index f0c17fdfc2c..4068966dafd 100644
--- a/lisp/transient.el
+++ b/lisp/transient.el
@@ -5524,15 +5524,14 @@ search instead."
             lisp-imenu-generic-expression :test #'equal)
 
 (defun transient--suspend-text-conversion-style ()
-  ;; Added in Emacs 30.1, but not defined on all platforms.
-  (static-when (boundp 'overriding-text-conversion-style)
-    (when text-conversion-style
-      (letrec ((suspended overriding-text-conversion-style)
-               (fn (lambda ()
-                     (setq overriding-text-conversion-style nil)
-                     (remove-hook 'transient-exit-hook fn))))
-        (setq overriding-text-conversion-style suspended)
-        (add-hook 'transient-exit-hook fn)))))
+  (when (and text-conversion-style
+             (bound-and-true-p overriding-text-conversion-style))
+    (letrec ((suspended overriding-text-conversion-style)
+             (fn (lambda ()
+                   (setq overriding-text-conversion-style nil)
+                   (remove-hook 'transient-exit-hook fn))))
+      (setq overriding-text-conversion-style suspended)
+      (add-hook 'transient-exit-hook fn))))
 
 (declare-function which-key-mode "ext:which-key" (&optional arg))