diff --git a/libkwineffects/kwinglobals.h b/libkwineffects/kwinglobals.h
index d74dd7da16..0ca4891d78 100644
--- a/libkwineffects/kwinglobals.h
+++ b/libkwineffects/kwinglobals.h
@@ -187,14 +187,14 @@ KWIN_EXPORT xcb_screen_t *defaultScreen()
 }
 
 inline
-KWIN_EXPORT int displayWidth()
+KWIN_DEPRECATED_EXPORT int displayWidth()
 {
     xcb_screen_t *screen = defaultScreen();
     return screen ? screen->width_in_pixels : 0;
 }
 
 inline
-KWIN_EXPORT int displayHeight()
+KWIN_DEPRECATED_EXPORT int displayHeight()
 {
     xcb_screen_t *screen = defaultScreen();
     return screen ? screen->height_in_pixels : 0;