diff --git a/composite/compalloc.c b/composite/compalloc.c
index 05ffc7e85..433dc820a 100644
--- a/composite/compalloc.c
+++ b/composite/compalloc.c
@@ -67,6 +67,18 @@ compBlockHandler(ScreenPtr pScreen, void *pTimeout)
     cs->BlockHandler = NULL;
 }
 
+void
+compMarkAncestors(WindowPtr pWin)
+{
+    pWin = pWin->parent;
+    while (pWin) {
+        if (pWin->damagedDescendants)
+            return;
+        pWin->damagedDescendants = TRUE;
+        pWin = pWin->parent;
+    }
+}
+
 static void
 compReportDamage(DamagePtr pDamage, RegionPtr pRegion, void *closure)
 {
@@ -81,14 +93,7 @@ compReportDamage(DamagePtr pDamage, RegionPtr pRegion, void *closure)
     }
     cw->damaged = TRUE;
 
-    /* Mark the ancestors */
-    pWin = pWin->parent;
-    while (pWin) {
-        if (pWin->damagedDescendants)
-            break;
-        pWin->damagedDescendants = TRUE;
-        pWin = pWin->parent;
-    }
+    compMarkAncestors(pWin);
 }
 
 static void
diff --git a/composite/compint.h b/composite/compint.h
index f05c2d8a5..89f6507b9 100644
--- a/composite/compint.h
+++ b/composite/compint.h
@@ -236,6 +236,8 @@ Bool
 compReallocPixmap(WindowPtr pWin, int x, int y,
                   unsigned int w, unsigned int h, int bw);
 
+void compMarkAncestors(WindowPtr pWin);
+
 /*
  * compinit.c
  */
diff --git a/composite/compwindow.c b/composite/compwindow.c
index f88238146..e74ce661a 100644
--- a/composite/compwindow.c
+++ b/composite/compwindow.c
@@ -432,6 +432,7 @@ compReparentWindow(WindowPtr pWin, WindowPtr pPriorParent)
 {
     ScreenPtr pScreen = pWin->drawable.pScreen;
     CompScreenPtr cs = GetCompScreen(pScreen);
+    CompWindowPtr cw = GetCompWindow(pWin);
 
     pScreen->ReparentWindow = cs->ReparentWindow;
     /*
@@ -469,6 +470,10 @@ compReparentWindow(WindowPtr pWin, WindowPtr pPriorParent)
         (*pScreen->ReparentWindow) (pWin, pPriorParent);
     cs->ReparentWindow = pScreen->ReparentWindow;
     pScreen->ReparentWindow = compReparentWindow;
+
+    if (pWin->damagedDescendants || (cw && cw->damaged))
+        compMarkAncestors(pWin);
+
     compCheckTree(pWin->drawable.pScreen);
 }