diff --git a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/Columns.hs b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/Columns.hs
index d8d1e8ee..d4daf296 100644
--- a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/Columns.hs
+++ b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/Columns.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE FlexibleInstances #-}
 
 module Database.Relational.Schema.MySQLInfo.Columns where
 
diff --git a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/KeyColumnUsage.hs b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/KeyColumnUsage.hs
index 95479442..8889ee2c 100644
--- a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/KeyColumnUsage.hs
+++ b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/KeyColumnUsage.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE FlexibleInstances #-}
 
 module Database.Relational.Schema.MySQLInfo.KeyColumnUsage where
 
diff --git a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/TableConstraints.hs b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/TableConstraints.hs
index a2d8d409..47887845 100644
--- a/relational-schemas/src/Database/Relational/Schema/MySQLInfo/TableConstraints.hs
+++ b/relational-schemas/src/Database/Relational/Schema/MySQLInfo/TableConstraints.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE FlexibleInstances #-}
 
 module Database.Relational.Schema.MySQLInfo.TableConstraints where