diff --git a/nerdjack.h b/nerdjack.h
index c821eaf..ceaedc8 100644
--- a/nerdjack.h
+++ b/nerdjack.h
@@ -16,7 +16,7 @@
 #include "netutil.h"
 
 #define NERDJACK_CHANNELS 12
-#define NERDJACK_CLOCK_RATE 60000000
+#define NERDJACK_CLOCK_RATE 54000000
 #define NERDJACK_DATA_PORT 49155
 #define NERDJACK_UDP_RECEIVE_PORT 49156
 #define NERDJACK_COMMAND_PORT 49157