diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 5661a86907..5556e56cba 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1855,6 +1855,13 @@
Use this variable when the arguments need to be after the
.pro file list on the command line.
+
+
+ This variable is is used with recipes that inherit the
+ qmake_base
+ class or other classes that inherit
+ qmake_base.
+
@@ -1866,6 +1873,13 @@
Use this variable when the arguments need to be before the
.pro file list on the command line.
+
+
+ This variable is is used with recipes that inherit the
+ qmake_base
+ class or other classes that inherit
+ qmake_base.
+