diff --git a/crates/mun_hir/src/module_tree.rs b/crates/mun_hir/src/module_tree.rs
index b035c5db9..f8e1be50c 100644
--- a/crates/mun_hir/src/module_tree.rs
+++ b/crates/mun_hir/src/module_tree.rs
@@ -1,12 +1,12 @@
-use crate::ids::{ModuleId, PackageId};
-use crate::module_tree::diagnostics::ModuleTreeDiagnostic;
-use crate::visibility::RawVisibility;
 use crate::{
     arena::{Arena, Idx},
+    ids::{ModuleId, PackageId},
+    module_tree::diagnostics::ModuleTreeDiagnostic,
+    visibility::RawVisibility,
     DefDatabase, FileId, Name, SourceDatabase, Visibility,
 };
 use itertools::Itertools;
-use relative_path::{Component, RelativePath};
+use relative_path::RelativePath;
 use rustc_hash::FxHashMap;
 use std::sync::Arc;
 
@@ -40,7 +40,7 @@ impl std::ops::Index<LocalModuleId> for ModuleTree {
 }
 
 impl ModuleTree {
-    /// Construct the tree of modules from the set of files in a package
+    /// Constructs the tree of modules from the set of files in a package
     pub(crate) fn module_tree_query(
         db: &dyn SourceDatabase,
         package: PackageId,
@@ -148,15 +148,10 @@ impl ModuleTree {
     }
 }
 
-/// Given a path name, returns the module name
-fn normalize_module_name(name: Component) -> String {
-    name.as_str().replace("-", "_")
-}
-
 /// Given a relative path, returns a Vec with all the module names
 fn path_to_module_path(path: &RelativePath) -> Vec<String> {
     if path.extension().is_none() {
-        path.components().map(normalize_module_name).collect()
+        path.components().map(|c| c.as_str().to_owned()).collect()
     } else if path
         .file_stem()
         .map(|stem| stem.to_lowercase())
@@ -207,6 +202,7 @@ mod test {
         assert_eq!(is_valid_module_name("foo_bar"), true);
         assert_eq!(is_valid_module_name("3bar"), false);
         assert_eq!(is_valid_module_name("bar3"), true);
+        assert_eq!(is_valid_module_name("foo-bar"), false);
         assert_eq!(is_valid_module_name(""), false);
     }
 
@@ -232,10 +228,6 @@ mod test {
             path_to_module_path(RelativePath::new("mod.mun")),
             Vec::<String>::new()
         );
-        assert_eq!(
-            path_to_module_path(RelativePath::new("foo-bar/mod.mun")),
-            vec!["foo_bar"]
-        );
     }
 
     #[test]