diff --git a/Examples/FFT_01/FFT_01.ino b/Examples/FFT_01/FFT_01.ino
index e16368a..1f6b3da 100644
--- a/Examples/FFT_01/FFT_01.ino
+++ b/Examples/FFT_01/FFT_01.ino
@@ -58,6 +58,7 @@ ArduinoFFT<double> FFT = ArduinoFFT<double>(vReal, vImag, samples, samplingFrequ
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
diff --git a/Examples/FFT_02/FFT_02.ino b/Examples/FFT_02/FFT_02.ino
index a8cbc63..ebe8d5e 100644
--- a/Examples/FFT_02/FFT_02.ino
+++ b/Examples/FFT_02/FFT_02.ino
@@ -55,6 +55,7 @@ unsigned long startTime;
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
diff --git a/Examples/FFT_03/FFT_03.ino b/Examples/FFT_03/FFT_03.ino
index 67ed135..0a76b34 100644
--- a/Examples/FFT_03/FFT_03.ino
+++ b/Examples/FFT_03/FFT_03.ino
@@ -50,6 +50,7 @@ void setup()
 {
   sampling_period_us = round(1000000*(1.0/samplingFrequency));
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
diff --git a/Examples/FFT_04/FFT_04.ino b/Examples/FFT_04/FFT_04.ino
index 3934c10..49ac3f6 100644
--- a/Examples/FFT_04/FFT_04.ino
+++ b/Examples/FFT_04/FFT_04.ino
@@ -28,7 +28,7 @@
   of each of the frequencies that compose the signal are calculated. Finally,
   the frequency spectrum magnitudes are printed. If you use the Arduino IDE
   serial plotter, you will see a single spike corresponding to the 1000 Hz
-  frecuency.
+  frequency.
 */
 
 #include "arduinoFFT.h"
@@ -58,6 +58,8 @@ ArduinoFFT<double> FFT = ArduinoFFT<double>(vReal, vImag, samples, samplingFrequ
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
+  Serial.println("Ready");
 }
 
 void loop()
diff --git a/Examples/FFT_05/FFT_05.ino b/Examples/FFT_05/FFT_05.ino
index 4354fcd..ca3152e 100644
--- a/Examples/FFT_05/FFT_05.ino
+++ b/Examples/FFT_05/FFT_05.ino
@@ -59,6 +59,7 @@ ArduinoFFT<double> FFT = ArduinoFFT<double>(vReal, vImag, samples, samplingFrequ
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
@@ -88,7 +89,7 @@ void loop()
   PrintVector(vReal, (samples >> 1), SCL_FREQUENCY);
   double x;
   double v;
-  FFT.majorPeak(x, v);
+  FFT.majorPeak(&x, &v);
   Serial.print(x, 6);
   Serial.print(", ");
   Serial.println(v, 6);
diff --git a/keywords.txt b/keywords.txt
index 49fd943..c9b49c1 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -3,7 +3,7 @@
 #######################################
 
 #######################################
-# Datatypes (KEYWORD1)
+# Datatypes	(KEYWORD1)
 #######################################
 
 ArduinoFFT	KEYWORD1
diff --git a/library.json b/library.json
index de87c29..c9e5fe9 100644
--- a/library.json
+++ b/library.json
@@ -27,5 +27,6 @@
   ],
   "version": "2.0",
   "frameworks": ["arduino","mbed","espidf"],
-  "platforms": "*"
+  "platforms": "*",
+  "headers": "arduinoFFT.h"
 }