diff --git a/led1642gw.c b/led1642gw.c
index dcaded2..1e3bda9 100644
--- a/led1642gw.c
+++ b/led1642gw.c
@@ -221,7 +221,7 @@ void led1642gw_flush(void)
     // to the CLOBAL data latch.
     // once more, we do the trick with write_no_command, to 
     // shift data through all the ICs
-    if (channel <= NUM_LED1642GW_CHANNELS-1) {
+    if (channel < NUM_LED1642GW_CHANNELS-1) {
       write_data_latch(ledbuffer[channel+(NUM_LED1642GW_CHANNELS*ic)]);
     }
     else {