diff --git a/man/cgroup-sandboxing.xml b/man/cgroup-sandboxing.xml
index 56f7c4007b..d36a9b59d8 100644
--- a/man/cgroup-sandboxing.xml
+++ b/man/cgroup-sandboxing.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 
 <!--
   SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/man/common-variables.xml b/man/common-variables.xml
index 81425e57e2..97bf911bb2 100644
--- a/man/common-variables.xml
+++ b/man/common-variables.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE refsection PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/libsystemd-pkgconfig.xml b/man/libsystemd-pkgconfig.xml
index 3d22870739..02e4b8fc72 100644
--- a/man/libsystemd-pkgconfig.xml
+++ b/man/libsystemd-pkgconfig.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/standard-options.xml b/man/standard-options.xml
index eb27f5cb65..df71deaea9 100644
--- a/man/standard-options.xml
+++ b/man/standard-options.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE variablelist PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/standard-specifiers.xml b/man/standard-specifiers.xml
index 7aa7acaf60..3a2c0b0266 100644
--- a/man/standard-specifiers.xml
+++ b/man/standard-specifiers.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE tbody PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/supported-controllers.xml b/man/supported-controllers.xml
index 61cdf468d9..27888ac9a5 100644
--- a/man/supported-controllers.xml
+++ b/man/supported-controllers.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 
 <!--
   SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/man/system-only.xml b/man/system-only.xml
index afd3d32bc5..39786e8384 100644
--- a/man/system-only.xml
+++ b/man/system-only.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 
 <!--
   SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/man/system-or-user-ns.xml b/man/system-or-user-ns.xml
index 532c1ef64e..1475ed06e2 100644
--- a/man/system-or-user-ns.xml
+++ b/man/system-or-user-ns.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 
 <!--
   SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/man/tc.xml b/man/tc.xml
index 8d39be3d19..7c382480b3 100644
--- a/man/tc.xml
+++ b/man/tc.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 
 <!--
   SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/man/threads-aware.xml b/man/threads-aware.xml
index 442e45bbbb..7affbb2445 100644
--- a/man/threads-aware.xml
+++ b/man/threads-aware.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/user-system-options.xml b/man/user-system-options.xml
index f3bafaea38..952ac18a4f 100644
--- a/man/user-system-options.xml
+++ b/man/user-system-options.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE variablelist PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
diff --git a/man/version-info.xml b/man/version-info.xml
index 5dabf9d31a..f55c0971b4 100644
--- a/man/version-info.xml
+++ b/man/version-info.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE refsect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->