diff --git a/src/parser/new_context.rs b/src/parser/new_context.rs
index 5c38ecaa..12888ef0 100644
--- a/src/parser/new_context.rs
+++ b/src/parser/new_context.rs
@@ -30,17 +30,20 @@ struct Node<'r, T: 'r + ?Sized> {
     parent: Link<'r, T>,
 }
 
-struct ContextTree<'r> {
+struct ContextTree<'r, T: 'r + ?Sized> {
     // Not using Link so the ContextTree can own this node
-    head: Option<Node<'r, dyn OrgModeContext<'r>>>,
+    head: Option<Node<'r, T>>,
 }
 
-impl<'r> ContextTree<'r> {
+impl<'r> ContextTree<'r, dyn OrgModeContext<'r>> {
     pub fn new() -> Self {
         ContextTree { head: None }
     }
 
-    pub fn with_additional_node(&'r self, new_elem: &'r dyn OrgModeContext<'r>) -> ContextTree<'r> {
+    pub fn with_additional_node(
+        &'r self,
+        new_elem: &'r dyn OrgModeContext<'r>,
+    ) -> ContextTree<'r, dyn OrgModeContext<'r>> {
         let new_node = Node {
             elem: new_elem,
             parent: self.head.as_ref(),