diff --git a/AltSoftSerial.h b/AltSoftSerial.h
index eccb8d8..5b3de68 100644
--- a/AltSoftSerial.h
+++ b/AltSoftSerial.h
@@ -1,17 +1,17 @@
 /* An Alternative Software Serial Library
  * http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
  * Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -59,13 +59,13 @@ class AltSoftSerial : public Stream
 	using Print::write;
 	static void flushInput();
 	static void flushOutput();
-	// for drop-in compatibility with NewSoftSerial, rxPin & txPin ignored
-	AltSoftSerial(uint8_t rxPin, uint8_t txPin, bool inverse = false) { }
+	// for drop-in compatibility with SoftwareSerial rxPin, txPin, and inverse are ignored
+	AltSoftSerial(uint8_t /* rxPin */, uint8_t /* txPin */, bool /* inverse */ = false) { }
 	bool listen() { return false; }
 	bool isListening() { return true; }
 	bool overflow() { bool r = timing_error; timing_error = false; return r; }
 	static int library_version() { return 1; }
-	static void enable_timer0(bool enable) { }
+	static void enable_timer0(bool /* enable */) { }
 	static bool timing_error;
 private:
 	static void init(uint32_t cycles_per_bit);