diff --git a/modules/lang/plantuml/autoload.el b/modules/lang/plantuml/autoload.el
index 1fbd15a96..171febc8e 100644
--- a/modules/lang/plantuml/autoload.el
+++ b/modules/lang/plantuml/autoload.el
@@ -4,7 +4,7 @@
 (defun +plantuml/install ()
   "Install plantuml.jar."
   (interactive)
-  (unless (file-exists-p plantuml-jar-path)
-    (user-error "plantuml.jar already installed"))
-  (url-copy-file "https://kent.dl.sourceforge.net/project/plantuml/plantuml.jar"
-                 plantuml-jar-path))
+  (if (file-exists-p plantuml-jar-path)
+      (user-error "plantuml.jar already installed")
+    (url-copy-file "https://kent.dl.sourceforge.net/project/plantuml/plantuml.jar"
+                   plantuml-jar-path)))