diff --git a/src/bun.js/bindings/BunProcess.cpp b/src/bun.js/bindings/BunProcess.cpp
index 33fae1f8eb..4d2866e6dd 100644
--- a/src/bun.js/bindings/BunProcess.cpp
+++ b/src/bun.js/bindings/BunProcess.cpp
@@ -2565,9 +2565,9 @@ JSC_DEFINE_HOST_FUNCTION(Process_functioninitgroups, (JSGlobalObject * globalObj
         }
         username = pp->pw_name;
     } else {
-        JSString* str = user.getString(globalObject);
+        auto userString = user.toWTFString(globalObject);
         RETURN_IF_EXCEPTION(scope, {});
-        auto utf8 = str->utf8();
+        auto utf8 = userString.utf8();
         username = utf8.data();
     }