diff --git a/exercises/practice/satellite/satellite.pl b/exercises/practice/satellite/satellite.pl
index 7de451bd..2174780a 100644
--- a/exercises/practice/satellite/satellite.pl
+++ b/exercises/practice/satellite/satellite.pl
@@ -1,2 +1 @@
-
-tree_traversals(Tree, Preorder, Inorder) :- fail.
+tree_traversals(Tree, Preorder, Inorder).