diff --git a/nerdjack.c b/nerdjack.c
index 1cc55bb..a4075c4 100644
--- a/nerdjack.c
+++ b/nerdjack.c
@@ -374,6 +374,11 @@ nerd_data_stream (int data_fd, int numChannels, int *channel_list,
       alignment = 0;
       numgroups = 0;
 
+      if(memused) {
+          printf("#Packet lost");
+          continue;
+      }
+
       if (showmem)
 	{
 	  printf ("%lX %hd %hd\n", memused, adcused, packetsready);
diff --git a/nerdjack.h b/nerdjack.h
index ceaedc8..c821eaf 100644
--- a/nerdjack.h
+++ b/nerdjack.h
@@ -16,7 +16,7 @@
 #include "netutil.h"
 
 #define NERDJACK_CHANNELS 12
-#define NERDJACK_CLOCK_RATE 54000000
+#define NERDJACK_CLOCK_RATE 60000000
 #define NERDJACK_DATA_PORT 49155
 #define NERDJACK_UDP_RECEIVE_PORT 49156
 #define NERDJACK_COMMAND_PORT 49157