diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 52e37f2c66..6e6d208fc6 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -194,7 +194,7 @@
 
     <para>
         The results of these classes are <filename>tmp/deploy/source/</filename>
-        subdirs with sources sorted by
+        subdirectories with sources sorted by
         <filename><link linkend='var-LICENSE'>LICENSE</link></filename> field.
         If recipes list few licenses (or have entries like "Bitstream Vera"),
         the source archive is placed in each license directory.