diff --git a/src/cipher_analytical_machine/cli/cli.clj b/src/cipher_analytical_machine/cli/cli.clj
index 22b1841..c0230b8 100644
--- a/src/cipher_analytical_machine/cli/cli.clj
+++ b/src/cipher_analytical_machine/cli/cli.clj
@@ -122,8 +122,10 @@
 (defn set-symbols
   "Set defaults symbols for a language."
   [options]
-  (set-option options :symbols
-              (sf/default-symbol-factory (:language options))))
+  (if (contains? options :language)
+    (set-option options :symbols
+                (sf/default-symbol-factory (:language options)))
+    options))
 
 (defn load-and-set-option
   "Load the option and set it."