diff --git a/CHANGELOG b/CHANGELOG
index e0f757b3..05c5e342 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -10,6 +10,7 @@
 * Added COMM_SET_BATTERY_CUT command.
 * Added CAN_PACKET_SHUTDOWN CAN-command.
 * GPDRIVE output sample fix.
+* Some ISR optimization.
 
 === FW 4.02 ===
 * Position PID fix (most notable on multiturn encoders).
diff --git a/mc_interface.c b/mc_interface.c
index 1d0234a8..3250b126 100644
--- a/mc_interface.c
+++ b/mc_interface.c
@@ -1584,8 +1584,8 @@ void mc_interface_mc_timer_isr(bool is_second_motor) {
 		wrong_voltage_iterations = 0;
 	}
 
-	// Fetch these values here in a config-specific code to avoid some overheat of the general
-	// function. That will make this interrupt run a bit faster.
+	// Fetch these values in a config-specific way to avoid some overhead of the general
+	// functions. That will make this interrupt run a bit faster.
 	mc_state state;
 	float current;
 	float current_in;