diff --git a/ets2panda/compiler/lowering/ets/constantExpressionLowering.cpp b/ets2panda/compiler/lowering/ets/constantExpressionLowering.cpp
index 0d304337edb0b722278c4c15577833c4f7cda3a8..5872b9c841cf5dbce8dd6cc43104081e9cb18439 100644
--- a/ets2panda/compiler/lowering/ets/constantExpressionLowering.cpp
+++ b/ets2panda/compiler/lowering/ets/constantExpressionLowering.cpp
@@ -1236,7 +1236,15 @@ static bool IsConstantExpression(ir::AstNode *expr)
 
     if (expr->IsIdentifier()) {
         auto var = ResolveIdentifier(expr->AsIdentifier());
-        return var != nullptr && var->Declaration()->IsConstDecl();
+        if (var == nullptr || !var->Declaration()->IsConstDecl()) {
+            return false;
+        }
+        // ermolaevavarvara: Identifier is not constant if the variable is ArrowFunction (f.e. const foo = (n: number)
+        // => {} is not constant expr)
+        if (var->Declaration()->Node()->IsClassProperty()) {
+            return !var->Declaration()->Node()->AsClassProperty()->Value()->IsArrowFunctionExpression();
+        }
+        return true;
     }
 
     if (expr->IsMemberExpression()) {