diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 019e002d8bcd..e1821492d288 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -2265,7 +2265,7 @@ Parser<FullParseHandler, char16_t>::moduleBody(ModuleSharedContext* modulesc)
         DeclaredNamePtr p = modulepc.varScope().lookupDeclaredName(name);
         if (!p) {
             JSAutoByteString str;
-            if (!str.encodeLatin1(context, name))
+            if (!AtomToPrintableString(context, name, &str))
                 return null();
 
             JS_ReportErrorNumberLatin1(context, GetErrorMessage, nullptr,