diff --git a/modules/lang/crystal/config.el b/modules/lang/crystal/config.el
index d75ed9b3a..ac221d42a 100644
--- a/modules/lang/crystal/config.el
+++ b/modules/lang/crystal/config.el
@@ -7,7 +7,9 @@
   (set-eval-handler! 'crystal-mode
     '((:command     . "crystal")
       (:exec        . "%c %s")
-      (:description . "Run Crystal script"))))
+      (:description . "Run Crystal script")))
+  (after! dtrt-indent
+    (add-to-list 'dtrt-indent-hook-mapping-list '(crystal-mode ruby crystal-indent-level))))
 
 
 (def-package! flycheck-crystal