diff --git a/ir/ts/tsInterfaceDeclaration.cpp b/ir/ts/tsInterfaceDeclaration.cpp
index 6046a09be05b03b24637c0d023cd2bb763193834..4974d7282a1bb241b8148c4359e9b574e84f36e8 100644
--- a/ir/ts/tsInterfaceDeclaration.cpp
+++ b/ir/ts/tsInterfaceDeclaration.cpp
@@ -141,7 +141,8 @@ checker::Type *TSInterfaceDeclaration::InferType(checker::Checker *checker, bind
             binder::Variable *extendsVar = extends->Expr()->AsIdentifier()->Variable();
 
             if (!extendsVar) {
-                checker->ThrowTypeError({"Cannot find name ", extendsVar->Name()}, extends->Start());
+                checker->ThrowTypeError({"Cannot find name ", extends->Expr()->AsIdentifier()->Name()},
+                                        extends->Start());
             }
 
             if (!extendsVar->HasFlag(binder::VariableFlags::INTERFACE)) {