diff --git a/docs/src/mutool-object-pdf-object.rst b/docs/src/mutool-object-pdf-object.rst
index 2cc3df7f4a..e9165fa85d 100644
--- a/docs/src/mutool-object-pdf-object.rst
+++ b/docs/src/mutool-object-pdf-object.rst
@@ -86,7 +86,7 @@ All functions that take `PDFObjects`, do automatic translation between :title:`J
 
     Iterate over all the entries in a dictionary or array and call `fun` for each key-value pair.
 
-    :arg fun: Function in the format `function(key,value){...}`.
+    :arg fun: Function in the format `function(value,key){...}`.
 
 
 .. method:: push(item)