diff --git a/doc/developer-guidelines.sgml b/doc/developer-guidelines.sgml
index 1982974f..c900aeac 100644
--- a/doc/developer-guidelines.sgml
+++ b/doc/developer-guidelines.sgml
@@ -733,9 +733,6 @@ setup the tests. Run "make test" to run all the tests.
 	<para>Variables should be declared at the beginning of code blocks and
 	not inline because of portability with older compilers.</para>
 
-	<para>You should use /* */ for comments and not // as some compilers
-	do not handle the latter form.</para>
-
 	<para>You should also avoid using the type "bool" and its values
 	"true" and "false". Instead use the "int" type and the plugins' own
 	"TRUE"/"FALSE" values to keep the code uniformly.</para>