diff --git a/afsk/main.c b/afsk/main.c
index b8eea47f..274c8b12 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -447,7 +447,8 @@ int main(int argc, char * argv[]) {
   if ((i2c_bus3 == OFF) || (sim_mode == TRUE)) {
 
     sim_mode = TRUE;
-
+    i2c_bus3 = OFF;
+	    
     printf("Simulated telemetry mode!\n");
 
     srand((unsigned int)time(0));