diff --git a/api/client/commands.go b/api/client/commands.go
index 00dd761b1..4e013b8fe 100644
--- a/api/client/commands.go
+++ b/api/client/commands.go
@@ -1172,10 +1172,15 @@ func (cli *DockerCli) CmdImages(args ...string) error {
 	matchName := cmd.Arg(0)
 	// FIXME: --viz and --tree are deprecated. Remove them in a future version.
 	if *flViz || *flTree {
+		filterJson, err := filters.ToParam(imageFilterArgs)
+		if err != nil {
+			return err
+		}
 		v := url.Values{
 			"all":     []string{"1"},
-			"filters": []string{filters.ToParam(imageFilterArgs)},
+			"filters": []string{filterJson},
 		}
+
 		body, _, err := readBody(cli.call("GET", "/images/json?"+v.Encode(), nil, false))
 		if err != nil {
 			return err
@@ -1237,9 +1242,14 @@ func (cli *DockerCli) CmdImages(args ...string) error {
 			fmt.Fprintf(cli.out, " base [style=invisible]\n}\n")
 		}
 	} else {
-		v := url.Values{
-			"filters": []string{filters.ToParam(imageFilterArgs)},
+		filterJson, err := filters.ToParam(imageFilterArgs)
+		if err != nil {
+			return err
 		}
+		v := url.Values{
+			"filters": []string{filterJson},
+		}
+
 		if cmd.NArg() == 1 {
 			// FIXME rename this parameter, to not be confused with the filters flag
 			v.Set("filter", matchName)
diff --git a/utils/filters/parse.go b/utils/filters/parse.go
index 1eb46830a..c1d6936b9 100644
--- a/utils/filters/parse.go
+++ b/utils/filters/parse.go
@@ -1,8 +1,8 @@
 package filters
 
 import (
+	"encoding/json"
 	"errors"
-	"github.com/dotcloud/docker/pkg/beam/data"
 	"strings"
 )
 
@@ -40,13 +40,22 @@ var ErrorBadFormat = errors.New("bad format of filter (expected name=value)")
 /*
 packs the Args into an string for easy transport from client to server
 */
-func ToParam(a Args) string {
-	return data.Encode(a)
+func ToParam(a Args) (string, error) {
+	buf, err := json.Marshal(a)
+	if err != nil {
+		return "", err
+	}
+	return string(buf), nil
 }
 
 /*
 unpacks the filter Args
 */
 func FromParam(p string) (Args, error) {
-	return data.Decode(p)
+	args := Args{}
+	err := json.Unmarshal([]byte(p), &args)
+	if err != nil {
+		return nil, err
+	}
+	return args, nil
 }
diff --git a/utils/filters/parse_test.go b/utils/filters/parse_test.go
index c24fe3949..59c5a5d93 100644
--- a/utils/filters/parse_test.go
+++ b/utils/filters/parse_test.go
@@ -36,7 +36,10 @@ func TestParam(t *testing.T) {
 		"image.name": []string{"ubuntu*", "*untu"},
 	}
 
-	v := ToParam(a)
+	v, err := ToParam(a)
+	if err != nil {
+		t.Errorf("failed to marshal the filters: %s", err)
+	}
 	v1, err := FromParam(v)
 	if err != nil {
 		t.Errorf("%s", err)