1 files changed, 6 insertions, 1 deletions

diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 58c5418d16..e1511c5487 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -4633,7 +4633,12 @@
             <glossdef>
                 <para role="glossdeffirst">
 <!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
-                    Additional <filename>cmake</filename> options.
+                    Additional
+                    <ulink url='https://cmake.org/overview/'>CMake</ulink>
+                    options.
+                    See the
+                    <link linkend='ref-classes-cmake'><filename>cmake</filename></link>
+                    class for additional information.
                 </para>
             </glossdef>
         </glossentry>