diff --git a/misc/factor.sh b/misc/factor.sh
index 11ea2a9cdf..12fb45a3e9 100755
--- a/misc/factor.sh
+++ b/misc/factor.sh
@@ -270,7 +270,7 @@ refresh_image() {
 }
 
 install_libraries() {
-	sudo apt-get install libc6-dev libfreetype6-dev wget git-core git-doc libx11-dev glutg3-dev rlwrap
+	sudo apt-get install libc6-dev libfreetype6-dev libx11-dev xorg-dev glutg3-dev wget git-core git-doc rlwrap
 }
 
 case "$1" in