diff --git a/reference/image/functions/imagecolorallocatealpha.xml b/reference/image/functions/imagecolorallocatealpha.xml
index bc503aeca6..b26321fb80 100644
--- a/reference/image/functions/imagecolorallocatealpha.xml
+++ b/reference/image/functions/imagecolorallocatealpha.xml
@@ -55,8 +55,9 @@
      </listitem>
     </varlistentry>
    </variablelist>
-   The colors parameters are integers between 0 and 255 or hexadecimals
-   between 0x00 and 0xFF.
+   The <parameter>red</parameter>, <parameter>green</parameter>
+   and <parameter>blue</parameter> parameters are integers
+   between 0 and 255 or hexadecimals between 0x00 and 0xFF.
   </para>
  </refsect1>
  <refsect1 role="returnvalues">