diff --git a/language/functions.xml b/language/functions.xml
index adc92cfc55..30425b2494 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -598,7 +598,9 @@ NULL
       mode, only a variable of exact type of the type declaration will be
       accepted, or a <classname>TypeError</classname> will be thrown. The
       only exception to this rule is that an <type>integer</type> may be given
-      to a function expecting a <type>float</type>.
+      to a function expecting a <type>float</type>. Function calls from within
+      internal functions will not be affected by the <literal>strict_types</literal>
+      declaration.
      </para>
 
      <para>