fix OSX builds

diff --git a/libs/ardour/plugin_insert.cc b/libs/ardour/plugin_insert.cc
index a1c2e4b165c029d0360f92846ed62365dd0f1da6..bf10a6595c214c2c221a92debb746b1815928443 100644 (file)
--- a/libs/ardour/plugin_insert.cc
+++ b/libs/ardour/plugin_insert.cc
@@ -2437,11 +2437,12 @@ PluginInsert::add_plugin (boost::shared_ptr<Plugin> plugin)
                        }
                }
        }
-
+#if (defined WINDOWS_VST_SUPPORT || defined LXVST_SUPPORT)
        boost::shared_ptr<VSTPlugin> vst = boost::dynamic_pointer_cast<VSTPlugin> (plugin);
        if (vst) {
                vst->set_insert (this, _plugins.size ());
        }
+#endif
        _plugins.push_back (plugin);
 }