diff --git a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.xml b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.xml
index 4d8ee69b6d..a152218e32 100644
--- a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.xml
+++ b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.xml
@@ -1017,7 +1017,7 @@
             <glossdef>
                 <para>
                     Sets the BitBake debug output level to a specific value
-                    as incremented by the <filename>-d</filename> command line
+                    as incremented by the <filename>-D</filename> command line
                     option.
                     <note>
                         You must set this variable in the external environment