diff --git a/assets/parser.rs.erb b/assets/parser.rs.erb
index 3fc5e0e..48dd757 100644
--- a/assets/parser.rs.erb
+++ b/assets/parser.rs.erb
@@ -16,9 +16,6 @@
  * User code blocks
  *************************************************************************/
 
-<% unless @grammar.code_blocks.fetch("header", "").empty? %>
-<%= @grammar.code_blocks.fetch("header", "") %>
-<% end %>
 <%= @grammar.code_blocks.fetch("", "") %>
 
 /**************************************************************************
diff --git a/spec/json_parser.rust.propane b/spec/json_parser.rust.propane
index fcabc2f..d7caad5 100644
--- a/spec/json_parser.rust.propane
+++ b/spec/json_parser.rust.propane
@@ -1,4 +1,4 @@
-<<header
+<<
 pub const JSON_OBJECT: usize = 0;
 pub const JSON_ARRAY: usize = 1;
 pub const JSON_NUMBER: usize = 2;
diff --git a/spec/tree_node_memory_remains.rust.propane b/spec/tree_node_memory_remains.rust.propane
index f9cb138..0f42dd2 100644
--- a/spec/tree_node_memory_remains.rust.propane
+++ b/spec/tree_node_memory_remains.rust.propane
@@ -1,7 +1,7 @@
 tree;
 tree_prefix P;
 
-<<header
+<<
 #[derive(Clone, Default)]
 pub struct TokenVal {
     pub i64_: u64,