diff --git a/application.c b/application.c
index 1e681ae..11ffd12 100644
--- a/application.c
+++ b/application.c
@@ -496,7 +496,7 @@ static void command_monitor(void* argument)
 				const bool pin = (port & channel_pins[i]); // get the pin level on which the channel is
 				if (pin != channels_level[i]) { // data on this channel changed
 					channel_changed = true; // remember one channel changed
-					channels_changed[i]++; // remember how many times this channel changed
+					channels_changed[i] = addu8_safe(channels_changed[i], 1); // remember how many times this channel changed
 					channels_level[i] = pin; // save new level
 				}
 			}