diff --git a/libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.pde b/libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.ino
similarity index 100%
rename from libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.pde
rename to libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.ino
diff --git a/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.pde b/libraries/Wire/examples/digital_potentiometer/digital_potentiometer.ino
similarity index 100%
rename from libraries/Wire/examples/digital_potentiometer/digital_potentiometer.pde
rename to libraries/Wire/examples/digital_potentiometer/digital_potentiometer.ino
diff --git a/libraries/Wire/examples/master_reader/master_reader.pde b/libraries/Wire/examples/master_reader/master_reader.ino
similarity index 100%
rename from libraries/Wire/examples/master_reader/master_reader.pde
rename to libraries/Wire/examples/master_reader/master_reader.ino
diff --git a/libraries/Wire/examples/master_writer/master_writer.pde b/libraries/Wire/examples/master_writer/master_writer.ino
similarity index 100%
rename from libraries/Wire/examples/master_writer/master_writer.pde
rename to libraries/Wire/examples/master_writer/master_writer.ino
diff --git a/libraries/Wire/examples/slave_receiver/slave_receiver.pde b/libraries/Wire/examples/slave_receiver/slave_receiver.ino
similarity index 100%
rename from libraries/Wire/examples/slave_receiver/slave_receiver.pde
rename to libraries/Wire/examples/slave_receiver/slave_receiver.ino
diff --git a/libraries/Wire/examples/slave_sender/slave_sender.pde b/libraries/Wire/examples/slave_sender/slave_sender.ino
similarity index 91%
rename from libraries/Wire/examples/slave_sender/slave_sender.pde
rename to libraries/Wire/examples/slave_sender/slave_sender.ino
index d3b238af90a9aa2ac1e933b2700f8f32674eafc7..f997ab0fca7947a8efcbb2ae0186a13ab0a12a48 100644
--- a/libraries/Wire/examples/slave_sender/slave_sender.pde
+++ b/libraries/Wire/examples/slave_sender/slave_sender.ino
@@ -27,6 +27,6 @@ void loop()
 // this function is registered as an event, see setup()
 void requestEvent()
 {
-  Wire.write("hello "); // respond with message of 6 bytes
+  Wire.write("a"); // respond with message of 6 bytes
                        // as expected by master
 }