diff --git a/src/espmega_iot_core.cpp b/src/espmega_iot_core.cpp
index 84e0817..c602ac5 100644
--- a/src/espmega_iot_core.cpp
+++ b/src/espmega_iot_core.cpp
@@ -859,7 +859,7 @@ void ac_set_state(int mode, int temperature, int fan_speed)
     IrSender.sendRaw(ir_code_off, sizeof(ir_code_off) / sizeof(ir_code_off[0]), NEC_KHZ);
     break;
   case 1:
-    IrSender.sendRaw(ir_code_cool[fan_speed][temperature], sizeof(ir_code_cool[fan_speed][temperature]) / sizeof(ir_code_cool[fan_speed][0]), NEC_KHZ);
+    IrSender.sendRaw(ir_code_cool[fan_speed][temperature], sizeof(ir_code_cool[fan_speed][temperature]) / sizeof(ir_code_cool[fan_speed][temperature][0]), NEC_KHZ);
     break;
   case 2:
     IrSender.sendRaw(ir_code_fan[fan_speed], sizeof(ir_code_fan[fan_speed]) / sizeof(ir_code_fan[fan_speed][0]), NEC_KHZ);