diff --git a/chapter04/aboutsbus.xml b/chapter04/aboutsbus.xml
index a442c20ab..2fd61a7cf 100644
--- a/chapter04/aboutsbus.xml
+++ b/chapter04/aboutsbus.xml
@@ -36,7 +36,7 @@
   to give an estimate of how long it might take to install a package, but the
   numbers can vary by as much as dozens of minutes in some cases.</para>
 
-  <para>On some newer systems, the motherboard is capable of contolling 
+  <para>On some newer systems, the motherboard is capable of controlling 
   the system clock speed. This can be controlled with a command such as
   <command>powerprofilesctl</command>. This is not available in LFS, but 
   may be available on the host distro. After LFS is complete, it can be