diff --git a/reactos/drivers/network/ndis/ndis.def b/reactos/drivers/network/ndis/ndis.def
index f36539dbaeb..5eba1a29842 100644
--- a/reactos/drivers/network/ndis/ndis.def
+++ b/reactos/drivers/network/ndis/ndis.def
@@ -97,6 +97,7 @@ NdisEqualString@12
 NdisFreeBuffer@4
 NdisFreeBufferPool@4
 NdisFreeDmaChannel@4
+NdisFreeToBlockPool@4
 NdisFreeMemory@12
 NdisFreePacket@4
 NdisFreePacketPool@4