diff --git a/arduino/beken-72xx/cores/arduino/wiring_irq.c b/arduino/beken-72xx/cores/arduino/wiring_irq.c
index 8ccde62..4b1fc7b 100644
--- a/arduino/beken-72xx/cores/arduino/wiring_irq.c
+++ b/arduino/beken-72xx/cores/arduino/wiring_irq.c
@@ -69,6 +69,8 @@ void detachInterrupt(pin_size_t interruptNumber) {
 		return;
 	if (!pinSupported(pin, PIN_IRQ))
 		return;
+	irqHandlerList[interruptNumber] = NULL;
+	irqHandlerArgs[interruptNumber] = NULL;
 	gpio_int_disable(pin->gpio);
 	pin->enabled &= ~PIN_IRQ;
 }