diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index f1dae78d02..cc1958b771 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -1562,23 +1562,18 @@ VST3PI::restartComponent (int32 flags)
 		for (int32 i = 0; i < n_params; ++i) {
 			Vst::ParameterInfo pi;
 			if (_controller->getParameterInfo (i, pi) != kResultTrue) {
-#ifndef NDEBUG
-				printf ("Vst::kParamTitlesChanged: getParameterInfo (%d) failed\n", i);
-#endif
 				continue;
 			}
 			std::map<Vst::ParamID, uint32_t>::const_iterator idx = _ctrl_id_index.find (pi.id);
 			if (idx != _ctrl_id_index.end ()) {
 				Param& p (_ctrl_params[idx->second]);
 #ifndef NDEBUG
-				printf ("Vst::kParamTitlesChanged: update label (%d) '%s' -> '%s'\n", i, p.label.c_str(), tchar_to_utf8 (pi.title).c_str ());
+				if (DEBUG_ENABLED (DEBUG::VST3Config) && p.label != tchar_to_utf8 (pi.title)) {
+					DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3 ParamTitlesChanged: '%1' -> '%2'\n", p.label, tchar_to_utf8 (pi.title)));
+				}
 #endif
 				p.label  = tchar_to_utf8 (pi.title).c_str ();
 				p.normal = pi.defaultNormalizedValue;
-			} else {
-#ifndef NDEBUG
-				printf ("Vst::kParamTitlesChanged: no Ctrl for (%d)\n", i);
-#endif
 			}
 		}
 		// TODO notify GUI: