diff --git a/module04/ex02/main.c b/module04/ex02/main.c
index 478cecd..b0dc699 100644
--- a/module04/ex02/main.c
+++ b/module04/ex02/main.c
@@ -20,7 +20,6 @@
 //   13.2.6 : PCMSK2 – Pin Change Mask Register 2
 //    -> (1 << PCINT20) | (1 << PCINT18)
 
-volatile uint8_t prevPIND;							// Store previous state of PIND
 volatile uint8_t value = 0;
 
 void print_binary(int value) {
@@ -81,20 +80,10 @@ int main() {
 	PCICR = (1 << PCIE2);							// 13.2.4 : enable pin change interrupt, bit PCIE2 for PCINT[23:16], (Table 14-9 : alternates : PD2 - PCINT18, PD4 - PCINT20)
 	PCMSK2 = (1 << PCINT20) | (1 << PCINT18);		// 13.2.6 : enable individual pin chang interrupt
 
-	prevPIND = PIND;
-
 	while(1);
 }
 
 ISR(PCINT2_vect) {
-    uint8_t currentPIND = PIND;						// Read the current state of Port D
-    uint8_t changedPins = currentPIND ^ prevPIND;	// Find changed bits
-
-	if (!TEST(changedPins, SW1)) {
-		on_press(SW1, increment_led);
-	}
-	if (!TEST(changedPins, SW1)) {
-		on_press(SW2, decrement_led);
-	}
-	prevPIND = currentPIND;
+	on_press(SW1, increment_led);
+	on_press(SW2, decrement_led);
 }