diff --git a/src/wayland/outputmanagement_v2_interface.h b/src/wayland/outputmanagement_v2_interface.h
index 5257f965f7..172623dc0d 100644
--- a/src/wayland/outputmanagement_v2_interface.h
+++ b/src/wayland/outputmanagement_v2_interface.h
@@ -12,8 +12,10 @@
 namespace KWaylandServer
 {
 
+class Display;
 class OutputManagementV2InterfacePrivate;
 class OutputConfigurationV2Interface;
+
 /**
  * @class OutputManagementInterface
  *