diff --git a/Readme.md b/Readme.md
index e1011c3..a5b25c5 100644
--- a/Readme.md
+++ b/Readme.md
@@ -24,7 +24,7 @@ Clone this repository on your Pi or other Linux machine.
 Make sure that the system date is set correctly, otherwise Git may produce an error.
 
 ```
-sudo apt install git libusb-1.0-0-dev
+sudo apt install git libusb-1.0-0-dev pkg-config
 git clone --depth=1 https://github.com/raspberrypi/usbboot
 cd usbboot
 make