diff --git a/doc/xschem_man/symbol_property_syntax.html b/doc/xschem_man/symbol_property_syntax.html
index 469db224..a900f779 100644
--- a/doc/xschem_man/symbol_property_syntax.html
+++ b/doc/xschem_man/symbol_property_syntax.html
@@ -333,6 +333,11 @@ m5 net1 b net2 VSSPIN nlv w=wn l=ln geomod=0 m=1
extra="VPWR VGND subckt" since subckt is probably a spice attribute and you don't
want it in verilog.
+ verilogprefix
+
+ If this attribute is defined in symbol it will be used as a prefix to the symbol name and subcircuit
+ expansion in verilog netlists.
+
dir
Defines the direction of a symbol pin. Allowed values are in, out, inout.