diff --git a/avr/modules/reed/main.asm b/avr/modules/reed/main.asm
index d355c24..34d7d6a 100644
--- a/avr/modules/reed/main.asm
+++ b/avr/modules/reed/main.asm
@@ -352,6 +352,12 @@ reedSendValueIfChanged_l1:
 ; @clobbers r16, r18, r19, r20, r21, r22, r23, X (R3, R4, R6, R7, R8, R9, R10, R11, R12, R15, R16, R17, R18, R19, R20, R21, R22, X, Y)
 
 reedSendChange:
+  lds r18, com2Address
+  tst r18
+  brne reedSendChange_haveAddress
+  clc
+  ret
+reedSendChange_haveAddress:
   mov r18, r16  ; value to send in r19:r18
   clr r19
   ldi r16, 0xff ; dest addr: send to all