diff --git a/src/protocol/parser/visitor.rs b/src/protocol/parser/visitor.rs
index 582c2f26ba0fe1f17394975c0f62c9ec7620e078..b046c0662a0ed5872cb21777968605c4a02ac42c 100644
--- a/src/protocol/parser/visitor.rs
+++ b/src/protocol/parser/visitor.rs
@@ -16,7 +16,7 @@ pub(crate) const EXPR_BUFFER_INIT_CAPACITY: usize = 256;
 /// General context structure that is used while traversing the AST.
 pub(crate) struct Ctx<'p> {
     pub heap: &'p mut Heap,
-    pub module: &'p Module,
+    pub module: &'p mut Module,
     pub symbols: &'p mut SymbolTable,
     pub types: &'p mut TypeTable,
 }