diff --git a/src/leaf_data.hpp b/src/leaf_data.hpp
index 68705d0..2f84a05 100644
--- a/src/leaf_data.hpp
+++ b/src/leaf_data.hpp
@@ -54,7 +54,7 @@
     leaf_data_binary_data;
 
 auto const leaf_data_identityRef_data_def =
-    -module  >> node_identifier;
+    -module >> node_identifier;
 
 // TODO: get rid of this and use leaf_data_identityRef_data directly
 auto const leaf_data_identityRef_def =