diff --git a/libs/ardour/session_vst.cc b/libs/ardour/session_vst.cc
index 845293de7c..9c7a34b3c4 100644
--- a/libs/ardour/session_vst.cc
+++ b/libs/ardour/session_vst.cc
@@ -51,8 +51,11 @@ const char* Session::vst_can_do_strings[] = {
 	X_("sendVstTimeInfo"),
 	X_("sendVstEvents"),
 	X_("sendVstMidiEvent"),
+	X_("receiveVstEvents"),
+	X_("receiveVstMidiEvent"),
 	X_("supportShell"),
-	X_("shellCategory")
+	X_("shellCategory"),
+	X_("shellCategorycurID")
 };
 const int Session::vst_can_do_string_count = sizeof (vst_can_do_strings) / sizeof (char*);
 
diff --git a/libs/ardour/vst_info_file.cc b/libs/ardour/vst_info_file.cc
index 1aca4d6d3b..07c1f56543 100644
--- a/libs/ardour/vst_info_file.cc
+++ b/libs/ardour/vst_info_file.cc
@@ -562,10 +562,17 @@ static intptr_t
 simple_master_callback (AEffect *, int32_t opcode, int32_t, intptr_t, void *ptr, float)
 {
 	const char* vstfx_can_do_strings[] = {
+		"supplyIdle",
+		"sendVstTimeInfo",
+		"sendVstEvents",
+		"sendVstMidiEvent",
+		"receiveVstEvents",
+		"receiveVstMidiEvent",
 		"supportShell",
-		"shellCategory"
+		"shellCategory",
+		"shellCategorycurID"
 	};
-	const int vstfx_can_do_string_count = 2;
+	const int vstfx_can_do_string_count = 9;
 
 	if (opcode == audioMasterVersion) {
 		return 2400;