diff --git a/docs/manual/adding-packages-generic.txt b/docs/manual/adding-packages-generic.txt
index 7b8561a..53c8c21 100644
--- a/docs/manual/adding-packages-generic.txt
+++ b/docs/manual/adding-packages-generic.txt
@@ -288,6 +288,9 @@ LIBFOO_VERSION = 2.32
 Now, the variables that define what should be performed at the
 different steps of the build process.
 
+* +LIBFOO_EXTRACT_CMDS+ lists the actions to be performed to
+  extract the package in case no standard method applies
+
 * +LIBFOO_CONFIGURE_CMDS+ lists the actions to be performed to
   configure the package before its compilation.