diff --git a/src/bin/rhai-repl.rs b/src/bin/rhai-repl.rs
index ccb6af92..afdff9dc 100644
--- a/src/bin/rhai-repl.rs
+++ b/src/bin/rhai-repl.rs
@@ -247,6 +247,7 @@ fn setup_editor() -> Editor<()> {
     rl
 }
 
+/// Module containing sample functions.
 #[export_module]
 mod sample_functions {
     /// This is a sample function.
diff --git a/src/serde/metadata.rs b/src/serde/metadata.rs
index b6895277..31610850 100644
--- a/src/serde/metadata.rs
+++ b/src/serde/metadata.rs
@@ -168,6 +168,8 @@ pub fn gen_metadata_to_json(
     include_standard_packages: bool,
 ) -> serde_json::Result<String> {
     let _ast = ast;
+    #[cfg(feature = "metadata")]
+    let mut global_doc = String::new();
     let mut global = ModuleMetadata::new();
 
     #[cfg(not(feature = "no_module"))]
@@ -185,7 +187,16 @@ pub fn gen_metadata_to_json(
         .global_modules
         .iter()
         .filter(|m| !m.flags.contains(exclude_flags))
-        .flat_map(|m| m.iter_fn())
+        .flat_map(|m| {
+            #[cfg(feature = "metadata")]
+            if !m.doc().is_empty() {
+                if !global_doc.is_empty() {
+                    global_doc.push('\n');
+                }
+                global_doc.push_str(m.doc());
+            }
+            m.iter_fn()
+        })
         .for_each(|f| {
             #[allow(unused_mut)]
             let mut meta: FnMetadata = f.into();
@@ -213,7 +224,17 @@ pub fn gen_metadata_to_json(
 
     #[cfg(feature = "metadata")]
     if let Some(ast) = _ast {
-        global.doc = ast.doc();
+        if !ast.doc().is_empty() {
+            if !global_doc.is_empty() {
+                global_doc.push('\n');
+            }
+            global_doc.push_str(ast.doc());
+        }
+    }
+
+    #[cfg(feature = "metadata")]
+    {
+        global.doc = &global_doc;
     }
 
     serde_json::to_string_pretty(&global)