diff --git a/src/rx/DARWIN/rx_knet.c b/src/rx/DARWIN/rx_knet.c
index b3aa3a2b88..9250df82f9 100644
--- a/src/rx/DARWIN/rx_knet.c
+++ b/src/rx/DARWIN/rx_knet.c
@@ -41,6 +41,9 @@ rx_upcall(socket_t so, void *arg, __unused int waitflag)
     if (rxinit_status)
 	return;
 
+    /* See if a check for additional packets was issued */
+    rx_CheckPackets();
+
     p = rxi_AllocPacket(RX_PACKET_CLASS_RECEIVE);
     rx_computelen(p, tlen);
     rx_SetDataSize(p, tlen);    /* this is the size of the user data area */