diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index 39dedd2d85..a8a695400c 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -972,8 +972,9 @@
                 <title>Excluding Packages</title>
 
                 <para>
-                    It is possible to filter or mask out recipe and recipe append files such that 
-                    BitBake ignores them.  
+                    It is possible to filter or mask out <filename>.bb</filename> and 
+                    <filename>.bbappend</filename> files such that BitBake ignores them during 
+                    the build.  
                     You can do this by providing an expression with the 
                     <filename><ulink url='&YOCTO_DOCS_REF_URL;#var-BBMASK'>BBMASK</ulink></filename> 
                     variable.