diff --git a/README.md b/README.md
index b971026..28e76b4 100644
--- a/README.md
+++ b/README.md
@@ -90,7 +90,7 @@ sTune(float *input, float *output, TuningRule tuningRule, Action action, SerialM
 
 | Serial Mode     | Description                                                  |
 | --------------- | ------------------------------------------------------------ |
-| `serialOFF`     | No serial output will occur.                                 |
+| `printOFF`     | No serial output will occur.                                 |
 | `printALL`      | Prints test data while settling and during the test run. A summary of results is printed when testing completes. |
 | `printSUMMARY`  | A summary of results is printed when testing completes.      |
 | `printDEBUG`    | Same as `printALL`but includes printing diagnostic data during test run. |
@@ -101,7 +101,7 @@ sTune(float *input, float *output, TuningRule tuningRule, Action action, SerialM
 
 ```c++
 sTune tuner = sTune(&Input, &Output, tuner.ZN_PID, tuner.directIP, tuner.printALL);
-/*                                         ZN_PID           directIP     serialOFF
+/*                                         ZN_PID           directIP     printOFF
                                            DampedOsc_PID    direct5T     printALL
                                            NoOvershoot_PID  reverseIP    printSUMMARY
                                            CohenCoon_PID    reverse5T    printDEBUG