diff --git a/crates/uv-resolver/src/lock.rs b/crates/uv-resolver/src/lock.rs
index 3775be8bd..bc5ecbe45 100644
--- a/crates/uv-resolver/src/lock.rs
+++ b/crates/uv-resolver/src/lock.rs
@@ -461,6 +461,10 @@ impl std::str::FromStr for Source {
                 kind: SourceKind::Path,
                 url,
             }),
+            "directory" => Ok(Source {
+                kind: SourceKind::Directory,
+                url,
+            }),
             name => Err(SourceParseError::unrecognized_source_name(s, name)),
         }
     }