diff --git a/fixtures/queryer.json b/fixtures/queryer.json
index ddb1ac0..93c08e9 100644
--- a/fixtures/queryer.json
+++ b/fixtures/queryer.json
@@ -2461,11 +2461,13 @@
           "constraint": "fk_attachment_attachable_entity",
           "source_type": "attachment",
           "source_columns": [
-            "attachable_id"
+            "attachable_id",
+            "attachable_type"
           ],
           "destination_type": "entity",
           "destination_columns": [
-            "id"
+            "id",
+            "type"
           ],
           "prefix": "attachable"
         }
diff --git a/src/queryer/compiler.rs b/src/queryer/compiler.rs
index 8d9f8db..0a93239 100644
--- a/src/queryer/compiler.rs
+++ b/src/queryer/compiler.rs
@@ -621,9 +621,6 @@ impl<'a> Compiler<'a> {
                   if edge.forward && relation.source_columns.len() > 1 {
                     poly_col = Some(&relation.source_columns[1]); // e.g., target_type
                     table_to_alias = &relation.source_type; // e.g., relationship
-                  } else if !edge.forward && relation.destination_columns.len() > 1 {
-                    poly_col = Some(&relation.destination_columns[1]); // e.g., source_type
-                    table_to_alias = &relation.destination_type; // e.g., relationship
                   }
 
                   if let Some(col) = poly_col {