diff --git a/parser/ETSparser.cpp b/parser/ETSparser.cpp
index b9eeaf0426a4dce390bc64f76aa1e934562612bd..2dbe85b3568d24895f852cceb09ac02506a6f68c 100644
--- a/parser/ETSparser.cpp
+++ b/parser/ETSparser.cpp
@@ -753,6 +753,9 @@ void ETSParser::ParseClassFieldDefiniton(ir::Identifier *fieldName, ir::Modifier
     auto *field = AllocNode<ir::ClassProperty>(fieldName, initializer, typeAnnotation, modifiers, Allocator(), false);
 
     if ((modifiers & ir::ModifierFlags::CONST) != 0) {
+        if (initializer != nullptr) {
+            ThrowSyntaxError("Missing initalizer in const declaration");
+        }
         Binder()->AddDecl<binder::ConstDecl>(fieldName->Start(), fieldName->Name(), field);
     } else {
         Binder()->AddDecl<binder::LetDecl>(fieldName->Start(), fieldName->Name(), field);