diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index d7fdfed657..7bf6467b54 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -3050,7 +3050,7 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     You can use the "<filename>%</filename>" character as a
                     wildcard to match any number of characters, which can be
                     useful when specifying versions that contain long revision
-                    numberS that could potentially change.
+                    numbers that could potentially change.
                     Here are two examples:
                     <literallayout class='monospaced'>
      PREFERRED_VERSION_python = "2.6.6"