diff --git a/data/dbus-interfaces/org.gnome.Mutter.DebugControl.xml b/data/dbus-interfaces/org.gnome.Mutter.DebugControl.xml
index 0c40e2b9f..56a271680 100644
--- a/data/dbus-interfaces/org.gnome.Mutter.DebugControl.xml
+++ b/data/dbus-interfaces/org.gnome.Mutter.DebugControl.xml
@@ -7,7 +7,6 @@
 
     <property name="ForceHDR" type="b" access="readwrite" />
     <property name="ForceLinearBlending" type="b" access="readwrite" />
-    <property name="LuminancePercentage" type="u" access="readwrite" />
     <property name="SessionManagementProtocol" type="b" access="readwrite" />
     <property name="InhibitHwCursor" type="b" access="readwrite" />
     <property name="CursorShapeProtocol" type="b" access="readwrite" />
diff --git a/src/core/meta-debug-control-private.h b/src/core/meta-debug-control-private.h
index 801a5956c..0787fed89 100644
--- a/src/core/meta-debug-control-private.h
+++ b/src/core/meta-debug-control-private.h
@@ -24,8 +24,6 @@ gboolean meta_debug_control_is_linear_blending_forced (MetaDebugControl *debug_c
 
 gboolean meta_debug_control_is_hdr_forced (MetaDebugControl *debug_control);
 
-unsigned int meta_debug_control_get_luminance_percentage (MetaDebugControl *debug_control);
-
 gboolean meta_debug_control_is_session_management_protocol_enabled (MetaDebugControl *debug_control);
 
 gboolean meta_debug_control_is_hw_cursor_inhibited (MetaDebugControl *debug_control);
diff --git a/src/core/meta-debug-control.c b/src/core/meta-debug-control.c
index f8ba4b3cc..bc97368b9 100644
--- a/src/core/meta-debug-control.c
+++ b/src/core/meta-debug-control.c
@@ -182,8 +182,6 @@ meta_debug_control_init (MetaDebugControl *debug_control)
   meta_dbus_debug_control_set_force_linear_blending (dbus_debug_control,
                                                      force_linear_blending);
 
-  meta_dbus_debug_control_set_luminance_percentage (dbus_debug_control, 100);
-
   session_management_protocol =
     g_strcmp0 (getenv ("MUTTER_DEBUG_SESSION_MANAGEMENT_PROTOCOL"), "1") == 0;
   meta_dbus_debug_control_set_session_management_protocol (dbus_debug_control,
@@ -223,15 +221,6 @@ meta_debug_control_is_hdr_forced (MetaDebugControl *debug_control)
   return meta_dbus_debug_control_get_force_hdr (dbus_debug_control);
 }
 
-unsigned int
-meta_debug_control_get_luminance_percentage (MetaDebugControl *debug_control)
-{
-  MetaDBusDebugControl *dbus_debug_control =
-    META_DBUS_DEBUG_CONTROL (debug_control);
-
-  return meta_dbus_debug_control_get_luminance_percentage (dbus_debug_control);
-}
-
 gboolean
 meta_debug_control_is_session_management_protocol_enabled (MetaDebugControl *debug_control)
 {