diff --git a/language-snippets.ent b/language-snippets.ent
index e29305e201..a5a5d37087 100644
--- a/language-snippets.ent
+++ b/language-snippets.ent
@@ -31,6 +31,9 @@ testing the return value of this function.</simpara></warning>'>
 <!ENTITY note.not-bin-safe '<warning><simpara>This function is not (yet) binary safe!</simpara></warning>'>
 <!ENTITY note.bin-safe '<note><simpara>This function is binary-safe</simpara></note>'>
 <!ENTITY note.no-windows '<note><simpara>This function is not implemented on Windows-platforms</simpara></note>'>
+<!ENTITY note.func-callback '<note><simpara>Instead of a function name, an
+array containing an object reference and a method name can also be
+supplied.</simpara></note>'>
 
 <!-- Notes for safe-mode limited functions: -->
 <!ENTITY note.sm.disabled '<note><simpara>&sm.disabled;</simpara></note>'>