diff --git a/modules/lang/kotlin/doctor.el b/modules/lang/kotlin/doctor.el
index 7dd70d076..63eabc017 100644
--- a/modules/lang/kotlin/doctor.el
+++ b/modules/lang/kotlin/doctor.el
@@ -1,4 +1,4 @@
 ;;; lang/kotlin/doctor.el -*- lexical-binding: t; -*-
 
 (unless (executable-find "ktlint")
-  (warn "ktlint not found. flycheck-kotlin won't work."))
+  (warn! "ktlint not found. flycheck-kotlin won't work."))