diff --git a/trytond/doc/topics/pyson.rst b/trytond/doc/topics/pyson.rst
index 178db9d4f5..d427434d89 100644
--- a/trytond/doc/topics/pyson.rst
+++ b/trytond/doc/topics/pyson.rst
@@ -88,7 +88,7 @@ A similar expression in Python looks like this::
 
     'context' in locals() and isinstance(context, dict) and 'company' in context and '=' or '!='
 
-.. _if-then-else: https://en.wikipedia.org/wiki/Conditional_(computer_programming)#If%E2%80%93then(%E2%80%93else)
+.. _if-then-else: https://en.wikipedia.org/wiki/Conditional_(computer_programming)#If-then-else_statement
 
 Given the PYSON statement::