diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 011baaa159a2..8e9716e362e1 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -156,7 +156,6 @@ struct drm_display_mode {
 	int height_mm;
 
 	/* Actual mode we give to hw */
-	int synth_clock;
 	int crtc_hdisplay;
 	int crtc_hblank_start;
 	int crtc_hblank_end;