diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 6be3177a18..737d075754 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -258,14 +258,14 @@ void PID_autotune(float temp, int extruder, int ncycles)
               Kp = 0.33*Ku;
               Ki = Kp/Tu;
               Kd = Kp*Tu/3;
-              SERIAL_PROTOCOLLNPGM(" Some overshoot ")
+              SERIAL_PROTOCOLLNPGM(" Some overshoot ");
               SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(Kp);
               SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(Ki);
               SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(Kd);
               Kp = 0.2*Ku;
               Ki = 2*Kp/Tu;
               Kd = Kp*Tu/3;
-              SERIAL_PROTOCOLLNPGM(" No overshoot ")
+              SERIAL_PROTOCOLLNPGM(" No overshoot ");
               SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(Kp);
               SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(Ki);
               SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(Kd);