diff --git a/doc/xschem_man/tutorial_symbol_generators.html b/doc/xschem_man/tutorial_symbol_generators.html
index 74de636f..2b6b3154 100644
--- a/doc/xschem_man/tutorial_symbol_generators.html
+++ b/doc/xschem_man/tutorial_symbol_generators.html
@@ -24,6 +24,11 @@ p{padding: 15px 30px 10px;}
then in the File/Search textbox add two parenthesis () (or put required parameters in
between, like (buf))
+
+ In recent xschem versions all generator scripts have an extension, so in following examples schematicgen
+ and symbolgen are renamed to schematicgen.tcl and symbolgen.tcl respectively.
+ The .tcl extension is used in this case since in my example generators are tcl scripts.
+
The symbolgen generator in this example takes either a (buf) or a (inv) parameter