diff --git a/render/animcur.c b/render/animcur.c
index f906cd813..1194cee7e 100644
--- a/render/animcur.c
+++ b/render/animcur.c
@@ -305,6 +305,9 @@ AnimCursorCreate(CursorPtr *cursors, CARD32 *deltas, int ncursor,
     int rc = BadAlloc, i;
     AnimCurPtr ac;
 
+    if (ncursor <= 0)
+        return BadValue;
+
     for (i = 0; i < screenInfo.numScreens; i++)
         if (!GetAnimCurScreen(screenInfo.screens[i]))
             return BadImplementation;
diff --git a/render/render.c b/render/render.c
index 113f6e0c5..fe9f03c8c 100644
--- a/render/render.c
+++ b/render/render.c
@@ -1799,6 +1799,8 @@ ProcRenderCreateAnimCursor(ClientPtr client)
     ncursor =
         (client->req_len -
          (bytes_to_int32(sizeof(xRenderCreateAnimCursorReq)))) >> 1;
+    if (ncursor <= 0)
+        return BadValue;
     cursors = xallocarray(ncursor, sizeof(CursorPtr) + sizeof(CARD32));
     if (!cursors)
         return BadAlloc;