diff --git a/composite/compinit.c b/composite/compinit.c
index 539dc0460..b19b3da62 100644
--- a/composite/compinit.c
+++ b/composite/compinit.c
@@ -110,12 +110,10 @@ compCheckBackingStore(WindowPtr pWin)
 {
     if (pWin->backingStore != NotUseful) {
         compRedirectWindow(serverClient, pWin, CompositeRedirectAutomatic);
-        pWin->backStorage = TRUE;
     }
     else {
         compUnredirectWindow(serverClient, pWin,
                              CompositeRedirectAutomatic);
-        pWin->backStorage = FALSE;
     }
 }
 
diff --git a/dix/window.c b/dix/window.c
index d99b61c02..b9c79ce95 100644
--- a/dix/window.c
+++ b/dix/window.c
@@ -484,7 +484,6 @@ SetWindowToDefaults(WindowPtr pWin)
     pWin->cursorIsNone = TRUE;
 
     pWin->backingStore = NotUseful;
-    pWin->backStorage = 0;
 
     pWin->mapped = FALSE;       /* off */
     pWin->realized = FALSE;     /* off */
diff --git a/include/windowstr.h b/include/windowstr.h
index bf31b9eee..c7e27965e 100644
--- a/include/windowstr.h
+++ b/include/windowstr.h
@@ -149,7 +149,6 @@ typedef struct _Window {
     unsigned borderIsPixel:1;
     unsigned cursorIsNone:1;    /* else real cursor (might inherit) */
     unsigned backingStore:2;
-    unsigned backStorage:1;     /* if bs is allocated */
     unsigned saveUnder:1;
     unsigned bitGravity:4;
     unsigned winGravity:4;