diff --git a/sqlgen/expression_sql_generator.go b/sqlgen/expression_sql_generator.go
index 82ce15c5..fdc02893 100644
--- a/sqlgen/expression_sql_generator.go
+++ b/sqlgen/expression_sql_generator.go
@@ -153,6 +153,13 @@ func (esg *expressionSQLGenerator) reflectSQL(b sb.SQLBuilder, val interface{})
 	case util.IsBool(valKind):
 		esg.Generate(b, v.Bool())
 	default:
+		// allow any type of value for prepared mode
+		if b.IsPrepared() {
+			esg.placeHolderSQL(b, val)
+
+			return
+		}
+
 		b.SetError(errors.NewEncodeError(val))
 	}
 }
diff --git a/sqlgen/expression_sql_generator_test.go b/sqlgen/expression_sql_generator_test.go
index ed75e12f..e5c057eb 100644
--- a/sqlgen/expression_sql_generator_test.go
+++ b/sqlgen/expression_sql_generator_test.go
@@ -123,12 +123,12 @@ func (esgs *expressionSQLGeneratorSuite) TestGenerate_Invalid() {
 	)
 }
 
-func (esgs *expressionSQLGeneratorSuite) TestGenerate_UnsupportedType() {
+func (esgs *expressionSQLGeneratorSuite) TestGenerate_OtherType() {
 	type strct struct{}
 	esgs.assertCases(
 		sqlgen.NewExpressionSQLGenerator("test", sqlgen.DefaultDialectOptions()),
 		expressionTestCase{val: strct{}, err: "goqu_encode_error: Unable to encode value {}"},
-		expressionTestCase{val: strct{}, err: "goqu_encode_error: Unable to encode value {}", isPrepared: true},
+		expressionTestCase{val: strct{}, sql: "?", isPrepared: true, args: []interface{}{strct{}}},
 	)
 }