diff --git a/expected/pg_variables.out b/expected/pg_variables.out
index e21ec67..180ebd1 100644
--- a/expected/pg_variables.out
+++ b/expected/pg_variables.out
@@ -565,9 +565,11 @@ ERROR:  there is a record in the variable "r1" with same key
 SELECT pgv_insert('vars3', 'r1', row(1, 'str1', 'str2'));
 ERROR:  new record structure have 3 attributes, but variable "r1" structure have 2.
 SELECT pgv_insert('vars3', 'r1', row(1, 1));
-ERROR:  new record attribute type for attribute number 2 differs from variable "r1" structure. You may need explicit type casts.
+ERROR:  new record attribute type for attribute number 2 differs from variable "r1" structure.
+HINT:  You may need explicit type casts.
 SELECT pgv_insert('vars3', 'r1', row('str1', 'str1'));
-ERROR:  new record attribute type for attribute number 1 differs from variable "r1" structure. You may need explicit type casts.
+ERROR:  new record attribute type for attribute number 1 differs from variable "r1" structure.
+HINT:  You may need explicit type casts.
 SELECT pgv_select('vars3', 'r1', ARRAY[[1,2]]); -- fail
 ERROR:  searching for elements in multidimensional arrays is not supported
 -- Test variables caching
@@ -959,7 +961,8 @@ SELECT pgv_insert('vars', 'r2', row(1, 'str1'));
 (1 row)
 
 SELECT pgv_insert('vars', 'r2', foo) FROM foo;
-ERROR:  new record attribute type for attribute number 2 differs from variable "r2" structure. You may need explicit type casts.
+ERROR:  new record attribute type for attribute number 2 differs from variable "r2" structure.
+HINT:  You may need explicit type casts.
 SELECT pgv_select('vars', 'r2');
  pgv_select 
 ------------
diff --git a/pg_variables_record.c b/pg_variables_record.c
index d34d12c..3d7ca18 100644
--- a/pg_variables_record.c
+++ b/pg_variables_record.c
@@ -204,9 +204,9 @@ check_attributes(Variable *variable, TupleDesc tupdesc)
 			ereport(ERROR,
 					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 					 errmsg("new record attribute type for attribute number %d "
-							"differs from variable \"%s\" structure. You may "
-							"need explicit type casts.",
-							i + 1, GetName(variable))));
+							"differs from variable \"%s\" structure.",
+							i + 1, GetName(variable)),
+					 errhint("You may need explicit type casts.")));
 	}
 }