diff --git a/lamp_switch/lamp_switch.ino b/lamp_switch/lamp_switch.ino
index 27824a6..c5db493 100644
--- a/lamp_switch/lamp_switch.ino
+++ b/lamp_switch/lamp_switch.ino
@@ -80,6 +80,7 @@ ISR(PCINT0_vect) {
 }
 
 ISR(WDT_vect) {
+  disableWdt();
   debug("wdt");
   byte state = digitalRead(SWITCH);
   if (state == LOW) {
@@ -87,7 +88,6 @@ ISR(WDT_vect) {
   } else {
     sendCommand(true);
   }
-  disableWdt();
 }
 
 void sleep() {