diff --git a/git-stree b/git-stree
index 317f5e0..4fdb099 100755
--- a/git-stree
+++ b/git-stree
@@ -143,18 +143,17 @@ function error
 # Command: `git stree forget`
 function forget_subtrees
 {
-  if [ -z "${args[1]}" ]; then
-    for name in $(get_subtree_list simple); do
-      rm_subtree "$name" && discreet "• Removed subtree '$name'"
-    done
-    yay 'Successfully removed all subtree definitions.'
-  else
-    error false "This is not the command you're looking for.
-git stree forget removes all subtrees defined for this repository.
-You specified a specific subtree ($1) on the command line,
-so you probably want: git stree rm $1
-"
+  if [ -n "${args[1]}" ]; then
+        error false "This is not the command you're looking for.
+    git stree forget removes all subtrees defined for this repository.
+    You specified a specific subtree ($1) on the command line,
+    so you probably want: git stree rm $1
+    "
   fi
+  for name in $(get_subtree_list simple); do
+    rm_subtree "$name" && discreet "• Removed subtree '$name'"
+  done
+  yay 'Successfully removed all subtree definitions.'
 }
 
 # Helper: computes a backport branch name based on the passed CLI name.