diff --git a/gtk2_ardour/luainstance.cc b/gtk2_ardour/luainstance.cc
index f2c5fe0966..9e657efbc0 100644
--- a/gtk2_ardour/luainstance.cc
+++ b/gtk2_ardour/luainstance.cc
@@ -1612,7 +1612,7 @@ LuaInstance::interactive_add (Gtk::Window& parent, LuaScriptInfo::ScriptType typ
 
 	ScriptParameterDialog spd (_("Set Script Parameters"), spi, reg, lsp);
 
-	if (spd.need_interation ()) {
+	if (spd.need_interaction ()) {
 		switch (spd.run ()) {
 			case Gtk::RESPONSE_ACCEPT:
 				break;
diff --git a/gtk2_ardour/script_selector.cc b/gtk2_ardour/script_selector.cc
index c915010aa2..6d7bb65db8 100644
--- a/gtk2_ardour/script_selector.cc
+++ b/gtk2_ardour/script_selector.cc
@@ -258,7 +258,7 @@ ScriptParameterDialog::ScriptParameterDialog (std::string title,
 }
 
 bool
-ScriptParameterDialog::need_interation () const
+ScriptParameterDialog::need_interaction () const
 {
 	if (!parameters_ok ()) {
 		return true;
diff --git a/gtk2_ardour/script_selector.h b/gtk2_ardour/script_selector.h
index f491b7a2d8..8778ee5427 100644
--- a/gtk2_ardour/script_selector.h
+++ b/gtk2_ardour/script_selector.h
@@ -66,7 +66,7 @@ class ScriptParameterDialog : public ArdourDialog
 public:
 	ScriptParameterDialog (std::string title, const ARDOUR::LuaScriptInfoPtr&, const std::vector<std::string>&, ARDOUR::LuaScriptParamList&);
 	std::string name () { return _name_entry.get_text (); }
-	bool need_interation () const;
+	bool need_interaction () const;
 
 private:
 	void update_sensitivity ();