man: set constant tag to NUL or NULL

[thirdparty/systemd.git] / man / sd_journal_has_runtime_files.xml

diff --git a/man/sd_journal_has_runtime_files.xml b/man/sd_journal_has_runtime_files.xml
index a1e0529423018ab4e8c51ca554d70edb981cc7af..e452b49e82a4087345765e1b960518bb217799c0 100644 (file)
--- a/man/sd_journal_has_runtime_files.xml
+++ b/man/sd_journal_has_runtime_files.xml
@@ -57,7 +57,7 @@
     <title>Return value</title>
     <para>Both <function>sd_journal_has_runtime_files()</function>
     and <function>sd_journal_has_persistent_files()</function> return -EINVAL
-    if their argument is NULL.
+    if their argument is <constant>NULL</constant>.
     </para>
   </refsect1>