diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index fe220c7c4e..b3d2448183 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1858,7 +1858,7 @@
                 </para>
 
                 <para>
-                    This variable is is used with recipes that inherit the
+                    This variable is used with recipes that inherit the
                     <link linkend='ref-classes-qmake_base'><filename>qmake_base</filename></link>
                     class or other classes that inherit
                     <filename>qmake_base</filename>.