diff --git a/vanitygaps.c b/vanitygaps.c
index 2b438be..7245e74 100644
--- a/vanitygaps.c
+++ b/vanitygaps.c
@@ -343,13 +343,13 @@ centeredfloatingmaster(Monitor *m)
 		/* go mfact box in the center if more than nmaster clients */
 		if (m->ww > m->wh) {
 			mw = m->ww * m->mfact - iv*mivf*(MIN(n, m->nmaster) - 1);
-			mh = m->wh * 0.9;
+			mh = m->wh * 0.9 - 2*oh;
 		} else {
 			mw = m->ww * 0.9 - iv*mivf*(MIN(n, m->nmaster) - 1);
 			mh = m->wh * m->mfact;
 		}
 		mx = m->wx + (m->ww - mw) / 2;
-		my = m->wy + (m->wh - mh - 2*oh) / 2;
+		my = m->wy + (m->wh - mh) / 2;
 
 		sx = m->wx + ov;
 		sy = m->wy + oh;