diff --git a/object_animrenderbake.py b/object_animrenderbake.py
index e2edf66089a6366c4adce4f85bbb996e81ce7f9a..ea9713bb71451f20fd149c8120be1e64c7c1d3d2 100644
--- a/object_animrenderbake.py
+++ b/object_animrenderbake.py
@@ -192,7 +192,7 @@ def register():
             default=250)
 
     bpy.types.RENDER_PT_bake.prepend(draw)
-    cycles_panel = getattr(bpy.types, "CyclesRender_PT_bake", None)
+    cycles_panel = getattr(bpy.types, "CYCLES_RENDER_PT_bake", None)
     if cycles_panel:
         cycles_panel.prepend(draw)
 
@@ -205,7 +205,7 @@ def unregister():
     del bpy.types.Scene.animrenderbake_end
 
     bpy.types.RENDER_PT_bake.remove(draw)
-    cycles_panel = getattr(bpy.types, "CyclesRender_PT_bake", None)
+    cycles_panel = getattr(bpy.types, "CYCLES_RENDER_PT_bake", None)
     if cycles_panel:
         cycles_panel.remove(draw)
 
diff --git a/render_auto_tile_size.py b/render_auto_tile_size.py
index 9c615337bb0c551a9fdd394a38188880854496b7..eb1076fc6136fb53b2d8a6d6e11220a3f2cac883 100644
--- a/render_auto_tile_size.py
+++ b/render_auto_tile_size.py
@@ -475,7 +475,7 @@ def register():
 
     # Note, the Cycles addon must be registered first, otherwise
     # this panel doesn't exist - better be safe here!
-    cycles_panel = getattr(bpy.types, "CyclesRender_PT_performance", None)
+    cycles_panel = getattr(bpy.types, "CYCLES_RENDER_PT_performance", None)
     if cycles_panel is not None:
         cycles_panel.append(menu_func_cycles)
 
@@ -487,7 +487,7 @@ def unregister():
     bpy.app.handlers.scene_update_post.remove(on_scene_update)
     bpy.types.RENDER_PT_performance.remove(menu_func_bi)
 
-    cycles_panel = getattr(bpy.types, "CyclesRender_PT_performance", None)
+    cycles_panel = getattr(bpy.types, "CYCLES_RENDER_PT_performance", None)
     if cycles_panel is not None:
         cycles_panel.remove(menu_func_cycles)