diff --git a/fb/fboverlay.c b/fb/fboverlay.c
index d8d9c2d75..5f5378bed 100644
--- a/fb/fboverlay.c
+++ b/fb/fboverlay.c
@@ -273,7 +273,6 @@ fbOverlayFinishScreenInit(ScreenPtr pScreen,
     int nvisuals;
     int ndepths;
     VisualID defaultVisual;
-    FbOverlayScrPrivPtr pScrPriv;
 
     if (!dixRegisterPrivateKey
         (&fbOverlayScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
@@ -282,7 +281,7 @@ fbOverlayFinishScreenInit(ScreenPtr pScreen,
     if (bpp1 == 24 || bpp2 == 24)
         return FALSE;
 
-    pScrPriv = malloc(sizeof(FbOverlayScrPrivRec));
+    FbOverlayScrPrivPtr pScrPriv = calloc(1, sizeof(FbOverlayScrPrivRec));
     if (!pScrPriv)
         return FALSE;