diff --git a/src/backends/drm/drm_egl_backend.h b/src/backends/drm/drm_egl_backend.h
index 880f88ddeb..81aa068baf 100644
--- a/src/backends/drm/drm_egl_backend.h
+++ b/src/backends/drm/drm_egl_backend.h
@@ -16,7 +16,6 @@
 #include <QPointer>
 #include <optional>
 
-struct gbm_surface;
 struct gbm_bo;
 
 namespace KWaylandServer
diff --git a/src/backends/drm/drm_gbm_swapchain.h b/src/backends/drm/drm_gbm_swapchain.h
index cd1ade677d..5a6b375a3d 100644
--- a/src/backends/drm/drm_gbm_swapchain.h
+++ b/src/backends/drm/drm_gbm_swapchain.h
@@ -18,9 +18,6 @@
 #include "drm_buffer_gbm.h"
 #include "utils/damagejournal.h"
 
-struct gbm_device;
-struct gbm_surface;
-
 namespace KWin
 {