diff --git a/render/animcur.c b/render/animcur.c
index eb8b817e2..a53e2a473 100644
--- a/render/animcur.c
+++ b/render/animcur.c
@@ -304,6 +304,9 @@ 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 fe5e37dd9..69d99c25b 100644
--- a/render/render.c
+++ b/render/render.c
@@ -1795,6 +1795,8 @@ 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;