diff --git a/reference/image/functions/imagefilter.xml b/reference/image/functions/imagefilter.xml
index b682b1ebbd..061283f6e0 100644
--- a/reference/image/functions/imagefilter.xml
+++ b/reference/image/functions/imagefilter.xml
@@ -64,8 +64,8 @@
           <constant>IMG_FILTER_GRAYSCALE</constant>, except you can specify the
           color. Use <parameter>arg1</parameter>, <parameter>arg2</parameter> and
           <parameter>arg3</parameter> in the form of
-          <parameter>red</parameter>, <parameter>blue</parameter>,
-          <parameter>green</parameter> and <parameter>arg4</parameter> for the
+          <parameter>red</parameter>, <parameter>green</parameter>,
+          <parameter>blue</parameter> and <parameter>arg4</parameter> for the
           <parameter>alpha</parameter> channel. The range for each color is 0 to 255.
          </simpara>
         </listitem>