diff --git a/reference/filesystem/functions/disk-free-space.xml b/reference/filesystem/functions/disk-free-space.xml
index bca3167342..e2a3b5b351 100644
--- a/reference/filesystem/functions/disk-free-space.xml
+++ b/reference/filesystem/functions/disk-free-space.xml
@@ -3,7 +3,7 @@
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.disk-free-space">
  <refnamediv>
   <refname>disk_free_space</refname>
-  <refpurpose>Returns available space in directory</refpurpose>
+  <refpurpose>Returns available space on filesystem or disk partition</refpurpose>
  </refnamediv>
  
  <refsect1 role="description">
diff --git a/reference/filesystem/functions/disk-total-space.xml b/reference/filesystem/functions/disk-total-space.xml
index c81a89ed90..b6cfefa8b4 100644
--- a/reference/filesystem/functions/disk-total-space.xml
+++ b/reference/filesystem/functions/disk-total-space.xml
@@ -3,7 +3,7 @@
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.disk-total-space">
  <refnamediv>
   <refname>disk_total_space</refname>
-  <refpurpose>Returns the total size of a directory</refpurpose>
+  <refpurpose>Returns the total size of a filesystem or disk partition</refpurpose>
  </refnamediv>
  
  <refsect1 role="description">