diff --git a/doc/customizing.sgml b/doc/customizing.sgml
index d8f6ef6be..1ae49f3c0 100644
--- a/doc/customizing.sgml
+++ b/doc/customizing.sgml
@@ -306,7 +306,7 @@ library for the targeted hardware.  The recommended way to do this is to
 modify the platform-independent standard library of the cc65 distribution.
 It is named "none.lib" in the lib directory of the distribution.
 
-When using &quot;none.lib&quot; we need to supply our own <tt>crt0<tt>
+When using &quot;none.lib&quot; we need to supply our own <tt>crt0</tt>
 module with custom startup code.  This is simply done by first copying the
 the library and giving it a new name, compiling the startup code with ca65,
 and finally using the ar65 archiver to add the module to the new library.