diff --git a/libs/ardour/ardour/plugin_insert.h b/libs/ardour/ardour/plugin_insert.h
index facb1552ef..26177ebf95 100644
--- a/libs/ardour/ardour/plugin_insert.h
+++ b/libs/ardour/ardour/plugin_insert.h
@@ -90,7 +90,7 @@ class LIBARDOUR_API PluginInsert : public Processor
 	ChanMapping input_map () const;
 	ChanMapping output_map () const;
 	bool has_midi_bypass () const;
-	bool has_midi_trhu () const;
+	bool has_midi_thru () const;
 
 #ifdef MIXBUS
 	bool is_channelstrip () const;
diff --git a/libs/ardour/plugin_insert.cc b/libs/ardour/plugin_insert.cc
index b8558c70db..2f1169245c 100644
--- a/libs/ardour/plugin_insert.cc
+++ b/libs/ardour/plugin_insert.cc
@@ -1003,7 +1003,7 @@ PluginInsert::has_midi_bypass () const
 }
 
 bool
-PluginInsert::has_midi_trhu () const
+PluginInsert::has_midi_thru () const
 {
 	if (_configured_in.n_midi () == 1 && _configured_out.n_midi () == 1
 			&& natural_input_streams ().n_midi () == 0 && natural_output_streams ().n_midi () == 0) {