diff --git a/engines/scumm/metaengine.cpp b/engines/scumm/metaengine.cpp
index 653571f909f..998774f6161 100644
--- a/engines/scumm/metaengine.cpp
+++ b/engines/scumm/metaengine.cpp
@@ -336,6 +336,12 @@ Common::Error ScummMetaEngine::createInstance(OSystem *syst, Engine **engine) {
 	// file transparently.
 	Common::updateGameGUIOptions(res.game.guioptions, getGameGUIOptionsDescriptionLanguage(res.language));
 
+	// If the game was added really long ago, it may be missing its "extra"
+	// field. When adding game-specific options, it may be our only way of
+	// telling certain versions apart, so make sure it's updated.
+	if (res.game.variant && res.game.variant[0] && !ConfMan.hasKey("extra"))
+		ConfMan.setAndFlush("extra", res.game.variant);
+
 	// Check for a user override of the platform. We allow the user to override
 	// the platform, to make it possible to add games which are not yet in
 	// our MD5 database but require a specific platform setting.
@@ -527,10 +533,8 @@ GUI::OptionsContainerWidget *ScummMetaEngine::buildEngineOptionsWidgetDynamic(GU
 	if (ConfMan.get("gameid", target) != "loom")
 		return nullptr;
 
-	// These Loom settings are only relevant for the EGA version, so
-	// exclude non-DOS versions. If the game was added a long time ago,
-	// the platform may still be listed as unknown, and there may be no
-	// "extra" field to query.
+	// These Loom settings are only relevant for the EGA version, since
+	// that is the only one that has an overture.
 
 	Common::Platform platform = Common::parsePlatform(ConfMan.get("platform", target));
 	if (platform != Common::kPlatformUnknown && platform != Common::kPlatformDOS)
@@ -541,7 +545,6 @@ GUI::OptionsContainerWidget *ScummMetaEngine::buildEngineOptionsWidgetDynamic(GU
 	if (extra == "Steam" || extra == "VGA")
 		return nullptr;
 
-	// So we still can't be quite sure it's the EGA version. Oh well...
 	return new Scumm::LoomEgaGameOptionsWidget(boss, name, target);
 }