diff --git a/src/netif/slipif.c b/src/netif/slipif.c
index 89421345..ccafa579 100644
--- a/src/netif/slipif.c
+++ b/src/netif/slipif.c
@@ -150,6 +150,7 @@ slipif_input( struct netif * netif )
   
   if (q != NULL) {
     pbuf_chain(q, p);
+    pbuf_free(p);
   } else {
     q = p;
   }