diff --git a/libs/ardour/linux_vst_info_file.cc b/libs/ardour/linux_vst_info_file.cc
index bdb975db03..9fae93f835 100644
--- a/libs/ardour/linux_vst_info_file.cc
+++ b/libs/ardour/linux_vst_info_file.cc
@@ -369,6 +369,7 @@ vstfx_get_info (char* dllpath)
 		VSTInfo *info;
 		info = load_vstfx_info_file (infofile);
 		fclose (infofile);
+		PBD::warning << "Cannot get LinuxVST information form " << dllpath << ": info file load failed." << endmsg;
 		return info;
 	}