diff --git a/codegen/src/lib.rs b/codegen/src/lib.rs
index 4426f173..3763b47e 100644
--- a/codegen/src/lib.rs
+++ b/codegen/src/lib.rs
@@ -161,7 +161,7 @@ pub fn combine_with_exported_module(args: proc_macro::TokenStream) -> proc_macro
         Err(e) => return e.to_compile_error().into(),
     };
     let tokens = quote! {
-        #module_path::rhai_generate_into_module(#module_expr, true);
+        #module_path::rhai_generate_into_module(#module_expr);
     };
     proc_macro::TokenStream::from(tokens)
 }
diff --git a/codegen/src/rhai_module.rs b/codegen/src/rhai_module.rs
index 66f23390..1661df43 100644
--- a/codegen/src/rhai_module.rs
+++ b/codegen/src/rhai_module.rs
@@ -17,7 +17,7 @@ pub(crate) fn generate_body(
     let mut set_fn_stmts: Vec<syn::Stmt> = Vec::new();
     let mut set_const_stmts: Vec<syn::Stmt> = Vec::new();
     let mut add_mod_blocks: Vec<syn::ExprBlock> = Vec::new();
-    let mut set_flattened_mod_blocks: Vec<syn::ExprBlock> = Vec::new();
+    let mut set_mod_blocks: Vec<syn::ExprBlock> = Vec::new();
     let str_type_path = syn::parse2::<syn::Path>(quote! { str }).unwrap();
 
     for (const_name, const_type, const_expr) in consts {
@@ -55,10 +55,10 @@ pub(crate) fn generate_body(
             })
             .unwrap(),
         );
-        set_flattened_mod_blocks.push(
+        set_mod_blocks.push(
             syn::parse2::<syn::ExprBlock>(quote! {
                 #(#cfg_attrs)* {
-                    self::#module_name::rhai_generate_into_module(m, flatten);
+                    self::#module_name::rhai_generate_into_module(m);
                 }
             })
             .unwrap(),
@@ -155,6 +155,11 @@ pub(crate) fn generate_body(
                     #(#add_mod_blocks)*
                 }
             }
+            pub fn rhai_generate_into_module(m: &mut Module) {
+                #(#set_fn_stmts)*
+                #(#set_const_stmts)*
+                #(#set_mod_blocks)*
+            }
         }
     })
     .unwrap();
diff --git a/doc/src/rust/packages/create.md b/doc/src/rust/packages/create.md
index 53ac17a0..c4ee27e4 100644
--- a/doc/src/rust/packages/create.md
+++ b/doc/src/rust/packages/create.md
@@ -66,9 +66,6 @@ In fact, this exactly is how Rhai's built-in packages, such as `BasicMathPackage
 `rhai::plugins::combine_with_exported_module!` adds all functions and constants from the
 [plugins][plugin module] definition into the package itself.
 
-All sub-modules are _flattened_ (i.e. all functions and constants defined within sub-modules are registered
-at the top level) and so there will not be any sub-modules added to the package.
-
 ```rust
 // Import necessary types and traits.
 use rhai::{
@@ -107,17 +104,8 @@ def_package!(rhai:MyPackage:"My own personal super package", module, {
 
     // Merge all registered functions and constants from the plugin module into the custom package.
     //
-    // Functions in the sub-module 'my_sub_module' are flattened and registered at the top level
-    // instead of in a sub-module.
-    //
     // The text string name in the middle parameter can be anything and is reserved for future use;
     // it is recommended to be an ID string that uniquely identifies the module.
-    //
-    // This call ends up registering three functions at the top level of the package:
-    //   1) greet
-    //   2) get_num
-    //   3) get_sub_num (flattened from sub-module 'my_sub_module')
-    //
     combine_with_exported_module!(module, "my-functions", my_module));
 });
 ```
diff --git a/tests/plugins.rs b/tests/plugins.rs
index 2bee84e4..928f0381 100644
--- a/tests/plugins.rs
+++ b/tests/plugins.rs
@@ -11,7 +11,7 @@ mod test {
     pub mod special_array_package {
         use rhai::{Array, INT};
 
-        pub const MYSTIC_NUMBER: INT = 42;
+        pub const MYSTIC_NUMBER: INT = 42 as INT;
 
         #[cfg(not(feature = "no_object"))]
         pub mod feature {
diff --git a/xxx.rs b/xxx.rs
new file mode 100644
index 00000000..e69de29b