diff --git a/man/kernel-command-line.xml b/man/kernel-command-line.xml
index 6d064f637..d8fa29d04 100644
--- a/man/kernel-command-line.xml
+++ b/man/kernel-command-line.xml
@@ -111,6 +111,7 @@
                         </varlistentry>
 
                         <varlistentry>
+                                <term><varname>-b</varname></term>
                                 <term><varname>emergency</varname></term>
                                 <term><varname>single</varname></term>
                                 <term><varname>s</varname></term>
diff --git a/man/systemd.xml b/man/systemd.xml
index 39bccff17..654463782 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -1127,6 +1127,7 @@
                         </varlistentry>
 
                         <varlistentry>
+                                <term><varname>-b</varname></term>
                                 <term><varname>emergency</varname></term>
 
                                 <listitem><para>Boot into emergency