diff --git a/package.json b/package.json
index 04fc230..228ba3d 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "engines": {
     "node": ">=16"
   },
-  "version": "5.3.0",
+  "version": "5.3.1",
   "type": "module",
   "description": "A GLSL ES 1.0 and 3.0 parser and preprocessor that can preserve whitespace and comments",
   "scripts": {
diff --git a/src/ast/ast-types.ts b/src/ast/ast-types.ts
index 78e7bfa..341b89b 100644
--- a/src/ast/ast-types.ts
+++ b/src/ast/ast-types.ts
@@ -323,7 +323,7 @@ export interface InterfaceDeclaratorNode extends BaseNode {
   qualifiers: TypeQualifiers;
   interface_type: IdentifierNode;
   lp: LiteralNode<'('>;
-  declarations: AstNode;
+  declarations: StructDeclarationNode;
   rp: LiteralNode<')'>;
   identifier?: QuantifiedIdentifierNode;
 }