diff --git a/util/reggen/gen_rtl.py b/util/reggen/gen_rtl.py
index 14e1475..cb11dcd 100644
--- a/util/reggen/gen_rtl.py
+++ b/util/reggen/gen_rtl.py
@@ -179,9 +179,9 @@
 
     # Read Register templates
     reg_top_tpl = Template(
-        filename=resource_filename('reggen', 'reg_top.tpl.sv'))
+        filename=resource_filename('reggen', 'reg_top.sv.tpl'))
     reg_pkg_tpl = Template(
-        filename=resource_filename('reggen', 'reg_pkg.tpl.sv'))
+        filename=resource_filename('reggen', 'reg_pkg.sv.tpl'))
 
     # Generate pkg.sv with block name
     with open(outdir + "/" + block.name + "_reg_pkg.sv", 'w',