diff --git a/apps/ex1.subx b/apps/ex1.subx
index acd7ea00..d1968415 100644
--- a/apps/ex1.subx
+++ b/apps/ex1.subx
@@ -2,7 +2,7 @@
 # Just return 42.
 #
 # To run:
-#   $ ./bootstrap translate init.linux apps/ex1.2.subx -o apps/ex1
+#   $ ./bootstrap translate init.linux apps/ex1.subx -o apps/ex1
 #   $ ./bootstrap run apps/ex1
 # Expected result:
 #   $ echo $?