diff --git a/query/encode.go b/query/encode.go
index f877b1c..51046ab 100644
--- a/query/encode.go
+++ b/query/encode.go
@@ -256,7 +256,7 @@ func reflectValue(values url.Values, val reflect.Value, scope string) error {
 			continue
 		}
 
-		if sv.Kind() == reflect.Struct {
+		if sv.Kind() == reflect.Struct && !opts.Contains("string") {
 			if err := reflectValue(values, sv, name); err != nil {
 				return err
 			}
diff --git a/query/encode_test.go b/query/encode_test.go
index a94b44d..10af29d 100644
--- a/query/encode_test.go
+++ b/query/encode_test.go
@@ -745,3 +745,35 @@ func TestParseTag(t *testing.T) {
 		}
 	}
 }
+
+type customStructString struct {
+	v string
+}
+
+func (s customStructString) String() string {
+	return s.v
+}
+
+func TestValues_CustomStructStringValue(t *testing.T) {
+	tests := []struct {
+		input interface{}
+		want  url.Values
+	}{
+		{
+			struct {
+				V customStructString `url:"v,string"`
+			}{customStructString{"a"}},
+			url.Values{"v": {"a"}},
+		},
+		{
+			struct {
+				V customStructString `url:"v"`
+			}{},
+			url.Values{},
+		},
+	}
+
+	for _, tt := range tests {
+		testValue(t, tt.input, tt.want)
+	}
+}