diff --git a/reference/image/functions/image-type-to-extension.xml b/reference/image/functions/image-type-to-extension.xml
index 133fc00b5f..f7f8243037 100644
--- a/reference/image/functions/image-type-to-extension.xml
+++ b/reference/image/functions/image-type-to-extension.xml
@@ -10,7 +10,7 @@
stringimage_type_to_extension
intimagetype
- boolinclude_dot
+ boolinclude_dot&true;
Returns the extension for the given IMAGETYPE_XXX