diff --git a/ets2panda/parser/ETSparser.cpp b/ets2panda/parser/ETSparser.cpp
index 827ca2a16637c93fdb1922d85785c7274475f4d2..78eec6c43a652658e6d879cff6d0914507219c72 100644
--- a/ets2panda/parser/ETSparser.cpp
+++ b/ets2panda/parser/ETSparser.cpp
@@ -157,7 +157,7 @@ void ETSParser::ParseFileHeaderFlag(lexer::SourcePosition startLoc, ArenaVector<
 
     ir::Expression *fileHeaderFlag = ParseStringLiteral();
     auto *exprStatementNode = AllocNode<ir::ExpressionStatement>(fileHeaderFlag);
-
+    ES2PANDA_ASSERT(exprStatementNode != nullptr);
     exprStatementNode->SetRange({startLoc, fileHeaderFlag->End()});
     ConsumeSemicolon(exprStatementNode);
     if (statements != nullptr) {