diff --git a/package-lock.json b/package-lock.json
index beefe5d7..e57b1947 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "solc-typed-ast",
-    "version": "18.1.4",
+    "version": "18.1.5",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "solc-typed-ast",
-            "version": "18.1.4",
+            "version": "18.1.5",
             "license": "Apache-2.0",
             "dependencies": {
                 "axios": "^1.6.8",
diff --git a/package.json b/package.json
index 0c466a22..716acfc9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "solc-typed-ast",
-    "version": "18.1.4",
+    "version": "18.1.5",
     "description": "A TypeScript library providing a normalized typed Solidity AST along with the utilities necessary to generate the AST (from Solc) and traverse/manipulate it.",
     "keywords": [],
     "files": [
diff --git a/src/ast/ast_node_factory.ts b/src/ast/ast_node_factory.ts
index 0558c03d..108d6a51 100644
--- a/src/ast/ast_node_factory.ts
+++ b/src/ast/ast_node_factory.ts
@@ -1074,8 +1074,8 @@ export class ASTNodeFactory {
         return node;
     }
 
-    copy<T extends ASTNode>(node: T): T {
-        const cache = new Map<number, number>();
+    copy<T extends ASTNode>(node: T, remappings: IDMap | undefined): T {
+        const cache = new Map<number, number>(remappings ? remappings.entries() : []);
         const clone = this.copyHelper(node, cache);
         const context = this.context;
         const postprocessor = this.postprocessor;