diff --git a/examples/CTCSS/CTCSS.ino b/examples/CTCSS/CTCSS.ino
index efbe162..b881f3c 100644
--- a/examples/CTCSS/CTCSS.ino
+++ b/examples/CTCSS/CTCSS.ino
@@ -166,7 +166,7 @@ void loop() {
     } else {
       Serial.setTimeout(40);
       freq = Serial.parseInt();
-      Serial.flush();
+      while (Serial.available()) Serial.read();
       radio.frequency(freq);
       Serial.print("set frequency: ");
       Serial.println(freq);
diff --git a/examples/HandyTalkie/HandyTalkie.ino b/examples/HandyTalkie/HandyTalkie.ino
index 96b53f6..b54761b 100644
--- a/examples/HandyTalkie/HandyTalkie.ino
+++ b/examples/HandyTalkie/HandyTalkie.ino
@@ -135,7 +135,7 @@ void loop() {
     } else {
       Serial.setTimeout(40);
       freq = Serial.parseInt();
-      Serial.flush();
+      while (Serial.available()) Serial.read();
       radio.frequency(freq);
       Serial.print("set frequency: ");
       Serial.println(freq);