diff --git a/professor_por_escola.json b/professor_por_escola.json
index f14a8cdbe4d0f444630fc4f1fde5165bb764d1e4..f9ca824c9db178bb2ae2371ba6a6114e4db9ae8e 100644
--- a/professor_por_escola.json
+++ b/professor_por_escola.json
@@ -19,8 +19,8 @@
             "reference_table": "regiao"
         },
         {
-            "keys": ["id"],
-            "reference_columns": ["id"],
+            "keys": ["ano_censo", "id"],
+            "reference_columns": ["ano_censo", "id"],
             "reference_table": "escola"
         }
     ]