diff --git a/Changelog.md b/Changelog.md
index 42c0e20..effa76c 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## [v0.4.1-dev][Unreleased] - Unreleased
+* Fixed error when loaded in gedit 47
 
 ## [v0.4.0] - 2023-11-02
 * Changed minimum gedit version required to 3.12
diff --git a/controlyourtabs/__init__.py b/controlyourtabs/__init__.py
index f43fa89..b3db37d 100644
--- a/controlyourtabs/__init__.py
+++ b/controlyourtabs/__init__.py
@@ -372,11 +372,17 @@ def on_multi_notebook_tab_removed(self, multi, notebook, tab, tab_models):
 
 		self.untrack_tab(tab, tab_models[notebook])
 
-	def on_window_active_tab_changed(self, window, tab, tab_models):
+	def on_window_active_tab_changed(self, window, tab, tab_models=None):
+		# tab parameter removed in gedit 47
+		if not tab_models:
+			tab_models = tab
+			tab = window.get_active_tab()
+
 		if log.query(log.INFO):
 			Gedit.debug_plugin_message(log.format("%s, %s", window, tab))
 
-		self.active_tab_changed(tab, tab_models[tab.get_parent()])
+		if tab:
+			self.active_tab_changed(tab, tab_models[tab.get_parent()])
 
 	def on_window_key_press_event(self, window, event, tab_models):
 		if log.query(log.INFO):
diff --git a/controlyourtabs/tabinfo.py b/controlyourtabs/tabinfo.py
index 881fcc7..1bea00e 100644
--- a/controlyourtabs/tabinfo.py
+++ b/controlyourtabs/tabinfo.py
@@ -35,15 +35,24 @@
 
 
 # based on switch statement in _gedit_tab_get_icon() in gedit-tab.c
-TAB_STATE_TO_NAMED_ICON = {
-	Gedit.TabState.STATE_PRINTING: 'printer-printing-symbolic',
-	Gedit.TabState.STATE_SHOWING_PRINT_PREVIEW: 'printer-symbolic',
-	Gedit.TabState.STATE_LOADING_ERROR: 'dialog-error-symbolic',
-	Gedit.TabState.STATE_REVERTING_ERROR: 'dialog-error-symbolic',
-	Gedit.TabState.STATE_SAVING_ERROR: 'dialog-error-symbolic',
-	Gedit.TabState.STATE_GENERIC_ERROR: 'dialog-error-symbolic',
-	Gedit.TabState.STATE_EXTERNALLY_MODIFIED_NOTIFICATION: 'dialog-warning-symbolic'
-}
+TAB_STATE_TO_NAMED_ICON = {}
+try:
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.PRINTING] = 'printer-printing-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.SHOWING_PRINT_PREVIEW] = 'printer-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.LOADING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.REVERTING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.SAVING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.GENERIC_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.EXTERNALLY_MODIFIED_NOTIFICATION] = 'dialog-warning-symbolic'
+except AttributeError:
+	# constant names before gedit 47
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_PRINTING] = 'printer-printing-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_SHOWING_PRINT_PREVIEW] = 'printer-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_LOADING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_REVERTING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_SAVING_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_GENERIC_ERROR] = 'dialog-error-symbolic'
+	TAB_STATE_TO_NAMED_ICON[Gedit.TabState.STATE_EXTERNALLY_MODIFIED_NOTIFICATION] = 'dialog-warning-symbolic'
 
 try:
 	# Gedit.TabState.STATE_PRINT_PREVIEWING removed in gedit 3.36