diff --git a/adapter/postgresql/helper_test.go b/adapter/postgresql/helper_test.go
index 04654e71..e553df17 100644
--- a/adapter/postgresql/helper_test.go
+++ b/adapter/postgresql/helper_test.go
@@ -194,6 +194,7 @@ func (h *Helper) TearUp() error {
 			, integer_array integer[]
 			, string_array text[]
 			, jsonb_map jsonb
+			, raw_jsonb_map jsonb
 
 			, integer_array_ptr integer[]
 			, string_array_ptr text[]
diff --git a/adapter/postgresql/postgresql_test.go b/adapter/postgresql/postgresql_test.go
index 7d3708e5..8431998d 100644
--- a/adapter/postgresql/postgresql_test.go
+++ b/adapter/postgresql/postgresql_test.go
@@ -25,6 +25,7 @@ import (
 	"context"
 	"database/sql"
 	"database/sql/driver"
+	"encoding/json"
 	"fmt"
 	"math/rand"
 	"strings"
@@ -229,6 +230,8 @@ func testPostgreSQLTypes(t *testing.T, sess db.Session) {
 		StringArray  StringArray `db:"string_array,stringarray"`
 		JSONBMap     JSONBMap    `db:"jsonb_map"`
 
+		RawJSONBMap *json.RawMessage `db:"raw_jsonb_map,omitempty"`
+
 		PGTypeInline `db:",inline"`
 
 		PGTypeAutoInline `db:",inline"`
@@ -275,6 +278,7 @@ func testPostgreSQLTypes(t *testing.T, sess db.Session) {
 	integerArrayValue := Int64Array{1, 2, 3, 4}
 	stringArrayValue := StringArray{"a", "b", "c"}
 	jsonbMapValue := JSONBMap{"Hello": "World"}
+	rawJSONBMap := json.RawMessage(`{"foo": "bar"}`)
 
 	testValue := "Hello world!"
 
@@ -329,6 +333,9 @@ func testPostgreSQLTypes(t *testing.T, sess db.Session) {
 				AutoJSONBMapInteger: map[string]interface{}{"a": 12.0, "b": 13.0},
 			},
 		},
+		PGType{
+			RawJSONBMap: &rawJSONBMap,
+		},
 		PGType{
 			IntegerValue: integerValue,
 			StringValue:  stringValue,
diff --git a/internal/sqlbuilder/convert.go b/internal/sqlbuilder/convert.go
index 50f344c9..37901f61 100644
--- a/internal/sqlbuilder/convert.go
+++ b/internal/sqlbuilder/convert.go
@@ -57,7 +57,7 @@ func toInterfaceArguments(value interface{}) (args []interface{}, isSlice bool)
 
 		// Byte slice gets transformed into a string.
 		if v.Type().Elem().Kind() == reflect.Uint8 {
-			return []interface{}{string(value.([]byte))}, false
+			return []interface{}{string(v.Bytes())}, false
 		}
 
 		total = v.Len()