diff --git "a/dll/win32/syssetup/wizard.c" "b/dll/win32/syssetup/wizard.c"
index 9afef48c4c5..14c282091be 100644
--- "a/dll/win32/syssetup/wizard.c"
+++ "b/dll/win32/syssetup/wizard.c"
@@ -2467,7 +2467,7 @@ FinishDlgProc(HWND hwndDlg,
             if (!SetupData->UnattendSetup || !SetupData->DisableGeckoInst)
             {
                 /* Run the Wine Gecko prompt */
-                Control_RunDLLW(hwndDlg, 0, L"appwiz.cpl install_gecko", SW_SHOW);
+                Control_RunDLLW(hwndDlg, 0, L"appwiz.cpl,,install_gecko", SW_SHOW);
             }
 
             /* Set title font */