diff --git a/lib/libfs/interface/map.c b/lib/libfs/interface/map.c
index 3962110..79ede3d 100644
--- a/lib/libfs/interface/map.c
+++ b/lib/libfs/interface/map.c
@@ -104,7 +104,13 @@ extern kern_status_t fs_msg_map(
 		mapping->m_vmo);
 
 	kern_handle_t vmo;
-	kern_handle_duplicate(mapping->m_vmo, &vmo);
+	kern_handle_transfer(
+		KERN_HANDLE_INVALID,
+		mapping->m_vmo,
+		KERN_HANDLE_INVALID,
+		KERN_HANDLE_INVALID,
+		HANDLE_TRANSFER_COPY,
+		&vmo);
 	f->f_ref++;
 
 	*out_err = SUCCESS;