diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index 3473921acf..b546bca212 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -2864,7 +2864,7 @@ VST3PI::getContextInfoValue (int32& value, FIDString id)
 		return kNotInitialized;
 	}
 	if (0 == strcmp (id, ContextInfo::kIndexMode)) {
-		value = ContextInfo::kFlatIndex;
+		value = ContextInfo::kPerTypeIndex;
 	} else if (0 == strcmp (id, ContextInfo::kType)) {
 		if (s->is_singleton ()) {
 			value = ContextInfo::kOut;