diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index 5da9861c85..2bcd7d01db 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -2115,7 +2115,7 @@
                     You need to name it using your distribution name
                     (e.g. <filename>mydistro.conf</filename>).</para>
                     <para>You can split out parts of your configuration file
-                    into include file and then "require" them from within
+                    into include files and then "require" them from within
                     your distribution configuration file.
                     Be sure to place the include files in the
                     <filename>conf/distro/include</filename> directory of
@@ -2318,7 +2318,7 @@
                     <listitem><para><filename>merge_config.sh</filename>:
                         Helps you manage configuration files and fragments
                         within the kernel.
-                        With this tool you can merge individual configuration
+                        With this tool, you can merge individual configuration
                         fragments together.
                         The tool allows you to make overrides and warns you
                         of any missing configuration options.
@@ -2589,7 +2589,7 @@
                     </para></listitem>
                 <listitem><para>Handling a package name alias
                     </para></listitem>
-                <listitem><para>Handling option module packaging
+                <listitem><para>Handling optional module packaging
                     </para></listitem>
             </itemizedlist>
         </para>
@@ -3134,7 +3134,7 @@
             By default, the Yocto Project uses
             <filename>SysVinit</filename> as the initialization manager.
             However, support also exists for <filename>systemd</filename>,
-            which is a full replacement of for <filename>init</filename> with
+            which is a full replacement for <filename>init</filename> with
             parallel starting of services, reduced shell overhead and other
             features, used by many distributions.
         </para>