diff --git a/640cplusplus.md b/640cplusplus.md
index e124c2a..40c5aaa 100644
--- a/640cplusplus.md
+++ b/640cplusplus.md
@@ -229,7 +229,7 @@ dw1->setMotorSpeed(1250)
 
 #### Select a Servo
 
-There are two servo ports on the 640 board. They are numbered from 1 to 6 with number 1 to the left hand side and number 6 the closest to the power connector.
+There are two servo ports on the 640 board. They are numbered from 1 and 2 with number 1 to the left hand side and number 2 the closest to the motor connectors.
 
 You select a servo in the same manner as you select motors, by requesting a servo object from the controller - to select the first servo we use:
 
@@ -352,4 +352,4 @@ If you want more control and need to move two or more motors at the same time th
 
 Unlike with Python, we need to take an extra step with C++ and compile our code so that it can be run on the Raspberry Pi.
 
-To do that, and to make it easier to re-compile as you update, we will create a *makefile*. The *makefile* is a little script that knows the location of all the libraries we want to include in our program and knows how to compile them together to make a single exectuable. 
\ No newline at end of file
+To do that, and to make it easier to re-compile as you update, we will create a *makefile*. The *makefile* is a little script that knows the location of all the libraries we want to include in our program and knows how to compile them together to make a single exectuable.