diff --git a/PDP11/pdp11_ddcmp.h b/PDP11/pdp11_ddcmp.h
index 46628b7b..448efa49 100644
--- a/PDP11/pdp11_ddcmp.h
+++ b/PDP11/pdp11_ddcmp.h
@@ -211,7 +211,7 @@ r = rand();
 rmax = (double)RAND_MAX;
 #endif
 if (msg[0] == DDCMP_ENQ) {
-    int eat =  0 + (int) (2000.0 * (r / rmax));
+    int eat =  0 + (int) (2000.0 * (r / (rmax + 1.0)));
     
     if (eat <= (trollHungerLevel * 2)) {    /* Hungry? */
         if (eat <= trollHungerLevel) {      /* Eat the packet */
@@ -225,7 +225,7 @@ if (msg[0] == DDCMP_ENQ) {
         }
     } 
 else {
-    int eat =  0 + (int) (3000.0 * (r / rmax));
+    int eat =  0 + (int) (3000.0 * (r / (rmax + 1.0)));
 
     if (eat <= (trollHungerLevel * 3)) {    /* Hungry? */
         if (eat <= trollHungerLevel) {      /* Eat the packet */
diff --git a/PDP11/pdp11_dmc.c b/PDP11/pdp11_dmc.c
index 503bd8c2..eae9b906 100644
--- a/PDP11/pdp11_dmc.c
+++ b/PDP11/pdp11_dmc.c
@@ -3037,6 +3037,11 @@ QH *qh = &controller->xmt_queue->hdr;
 
 while (ddcmp_compare (controller->link.rcv_pkt[DDCMP_NUM_OFFSET], GE, R, controller)) {
     BUFFER *buffer = dmc_buffer_allocate(controller);
+
+    if (NULL == buffer) {
+        sim_debug(DBG_INF, controller->device, "%s%d: No Buffers cause NAKMissingPackets to stop\n", controller->device->name, controller->index);
+        break;
+        }
     buffer->transfer_buffer = (uint8 *)malloc (DDCMP_HEADER_SIZE);
     buffer->count = DDCMP_HEADER_SIZE;
     ddcmp_build_nak_packet (buffer->transfer_buffer, 2, R, DDCMP_FLAG_SELECT);