diff --git a/kcmkwin/kwintabbox/main.h b/kcmkwin/kwintabbox/main.h
index db2d152cb7..249ccae39a 100644
--- a/kcmkwin/kwintabbox/main.h
+++ b/kcmkwin/kwintabbox/main.h
@@ -29,7 +29,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 class KShortcutsEditor;
 class KActionCollection;
-class QShowEvent;
 
 namespace KWin
 {