diff --git a/src/macro-core/macro-action-audio.cpp b/src/macro-core/macro-action-audio.cpp
index 909b4cf9..357521e9 100644
--- a/src/macro-core/macro-action-audio.cpp
+++ b/src/macro-core/macro-action-audio.cpp
@@ -39,6 +39,22 @@ const static std::map<MacroActionAudio::FadeType, std::string> fadeTypes = {
 constexpr auto fadeInterval = std::chrono::milliseconds(100);
 constexpr float minFade = 0.000001f;
 
+// For backwards compatibility
+#if LIBOBS_API_VER >= MAKE_SEMANTIC_VERSION(29, 0, 0)
+static float get_master_volume()
+{
+	return 1.f;
+}
+
+static void set_master_volume(float)
+{
+	return;
+}
+#else
+auto get_master_volume = obs_get_master_volume;
+auto set_master_volume = obs_set_master_volume;
+#endif
+
 void MacroActionAudio::SetFadeActive(bool value)
 {
 	if (_action == Action::SOURCE_VOLUME) {
@@ -87,7 +103,7 @@ void MacroActionAudio::SetVolume(float vol)
 		obs_source_set_volume(s, vol);
 		obs_source_release(s);
 	} else {
-		obs_set_master_volume(vol);
+		set_master_volume(vol);
 	}
 }
 
@@ -102,7 +118,7 @@ float MacroActionAudio::GetVolume()
 		curVol = obs_source_get_volume(s);
 		obs_source_release(s);
 	} else {
-		curVol = obs_get_master_volume();
+		curVol = get_master_volume();
 	}
 	return curVol;
 }
@@ -287,15 +303,13 @@ std::string MacroActionAudio::GetShortDesc() const
 static inline void populateActionSelection(QComboBox *list)
 {
 	for (const auto &[action, name] : actionTypes) {
-		if (action == MacroActionAudio::Action::MONITOR) {
-			if (obs_audio_monitoring_available()) {
-				list->addItem(obs_module_text(name.c_str()),
-					      static_cast<int>(action));
-			}
-		} else {
-			list->addItem(obs_module_text(name.c_str()),
-				      static_cast<int>(action));
+		if (action == MacroActionAudio::Action::MONITOR &&
+		    !obs_audio_monitoring_available()) {
+			continue;
 		}
+
+		list->addItem(obs_module_text(name.c_str()),
+			      static_cast<int>(action));
 	}
 }
 
@@ -473,6 +487,14 @@ void MacroActionAudioEdit::SetWidgetVisibility()
 	_wait->setVisible(hasVolumeControl(_entryData->_action) &&
 			  _entryData->_fade);
 
+	// TODO: Remove this in a future version:
+	if (_entryData->_action != MacroActionAudio::Action::MASTER_VOLUME &&
+	    obs_get_version() >= MAKE_SEMANTIC_VERSION(29, 0, 0)) {
+		_actions->removeItem(_actions->findText(obs_module_text(
+			actionTypes.at(MacroActionAudio::Action::MASTER_VOLUME)
+				.c_str())));
+	}
+
 	updateGeometry();
 	adjustSize();
 }