diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 80ae7701..3ecb4df3 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -416,8 +416,9 @@ void read_config_file() {
 //    latitude = toAprsFormat(latitude);
 //    longitude = toAprsFormat(longitude);
 //  }
-  Serial.printf("sim_yes: %s", sim_yes);	
-  if (strcmp(sim_yes, "yes") == 0) {
+  Serial.printf("sim_yes: %s\n", sim_yes);
+  char yes_string[] = "yes";	
+  if (strcmp(sim_yes, yes_string) == 0) {
 	  sim_mode = true;	
 	  Serial.println("Simulated telemetry mode set by config file");
   }