diff --git a/demos/TTSArmLinux/README.md b/demos/TTSArmLinux/README.md
index 1edd6589f..50ae1e4bf 100644
--- a/demos/TTSArmLinux/README.md
+++ b/demos/TTSArmLinux/README.md
@@ -12,7 +12,7 @@
 
 ```
 # Ubuntu
-sudo apt install build-essential cmake wget tar unzip
+sudo apt install build-essential cmake pkg-config wget tar unzip
 
 # CentOS
 sudo yum groupinstall "Development Tools"