diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 850221a3..3f44e921 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -334,8 +334,9 @@ void get_tlm_fox() {
         sleep(0.1); // 25); // 0.5);  // 25);
 //        sleep((unsigned int)sleepTime);
 /**/
-      Serial.println"Sleep period: %d\n", millis() - startSleep);
-      fflush(stdout);
+      Serial.print("Sleep period: ");
+      Serial.println(millis() - startSleep);
+//      fflush(stdout);
       
       sampleTime = (unsigned int) millis();
     } else