diff --git a/lua-penlight.spec b/lua-penlight.spec
index d7ad7b3..29b7788 100644
--- a/lua-penlight.spec
+++ b/lua-penlight.spec
@@ -18,7 +18,7 @@
 
 
 %define flavor @BUILD_FLAVOR@
-%define mod_name Penlight
+%define mod_name penlight
 %define lua_value  %(echo "%{flavor}" |sed -e 's:lua::')
 %define with_docs 1