diff --git a/src/en/index.md b/src/en/index.md
index 278ae45..ed47833 100644
--- a/src/en/index.md
+++ b/src/en/index.md
@@ -8,7 +8,7 @@ This GPIO Pinout is designed to be both a quick-reference and a comprehensive gu
 
 * BCM - Broadcom pin number, commonly called "GPIO", these are the ones you probably want to use with RPi.GPIO and GPIO Zero
 * WiringPi - Wiring Pi pin number (shown as a tooltip), for Gordon's Wiring Pi library
-* Physical - Number corresponding to the pins physical location on the header
+* Physical - Number corresponding to the pin's physical location on the header
 
 ##Raspberry Pi Zero
 
@@ -24,4 +24,4 @@ Now that the Raspberry Pi Model B Plus is here, I've updated Pinout with the 14
 
 ##Raspberry Pi Model "A" and "B"
 
-Pinout was originally designed for the old 26-pin Raspberry Pi models, you'll see the outline of this original header displayed on the left in a slightly darker shade. If you click a pin you'll see details of its BCM pin assignment on the original Rev 1 Pi.
\ No newline at end of file
+Pinout was originally designed for the old 26-pin Raspberry Pi models, you'll see the outline of this original header displayed on the left in a slightly darker shade. If you click a pin you'll see details of its BCM pin assignment on the original Rev 1 Pi.