diff --git a/api/client/utils.go b/api/client/utils.go
index b1fec647c4..19e280614e 100644
--- a/api/client/utils.go
+++ b/api/client/utils.go
@@ -167,7 +167,7 @@ func (cli *DockerCli) streamHelper(method, path string, setRawTerminal bool, in
 		return fmt.Errorf("Error: %s", bytes.TrimSpace(body))
 	}
 
-	if api.MatchesContentType(resp.Header.Get("Content-Type"), "application/json") {
+	if api.MatchesContentType(resp.Header.Get("Content-Type"), "application/json") || api.MatchesContentType(resp.Header.Get("Content-Type"), "application/x-json-stream") {
 		return utils.DisplayJSONMessagesStream(resp.Body, stdout, cli.terminalFd, cli.isTerminal)
 	}
 	if stdout != nil || stderr != nil {
diff --git a/api/server/server.go b/api/server/server.go
index 74bebfde1d..61774fc680 100644
--- a/api/server/server.go
+++ b/api/server/server.go
@@ -102,6 +102,10 @@ func writeJSON(w http.ResponseWriter, code int, v engine.Env) error {
 
 func streamJSON(job *engine.Job, w http.ResponseWriter, flush bool) {
 	w.Header().Set("Content-Type", "application/json")
+	if job.GetenvBool("lineDelim") {
+		w.Header().Set("Content-Type", "application/x-json-stream")
+	}
+
 	if flush {
 		job.Stdout.Add(utils.NewWriteFlusher(w))
 	} else {
@@ -976,6 +980,7 @@ func postBuild(eng *engine.Engine, version version.Version, w http.ResponseWrite
 	job.Setenv("q", r.FormValue("q"))
 	job.Setenv("nocache", r.FormValue("nocache"))
 	job.Setenv("forcerm", r.FormValue("forcerm"))
+	job.SetenvBool("lineDelim", version.GreaterThanOrEqualTo("1.15"))
 	job.SetenvJson("authConfig", authConfig)
 	job.SetenvJson("configFile", configFile)
 
diff --git a/api/server/server_unit_test.go b/api/server/server_unit_test.go
index 519652f377..b433cc7683 100644
--- a/api/server/server_unit_test.go
+++ b/api/server/server_unit_test.go
@@ -275,7 +275,7 @@ func TestGetEvents(t *testing.T) {
 	if !called {
 		t.Fatal("handler was not called")
 	}
-	assertContentType(r, "application/json", t)
+	assertContentType(r, "application/x-json-stream", t)
 	var stdout_json struct {
 		Since int
 		Until int
diff --git a/docs/sources/reference/api/docker_remote_api.md b/docs/sources/reference/api/docker_remote_api.md
index 10ee44d9a9..fb53283a1b 100644
--- a/docs/sources/reference/api/docker_remote_api.md
+++ b/docs/sources/reference/api/docker_remote_api.md
@@ -37,6 +37,12 @@ You can still call an old version of the API using
 
 ### What's new
 
+`POST /build`
+`GET /events`
+
+**New!**
+Now has header: `Content-Type: application/x-json-stream`.
+
 ## v1.14
 
 ### Full Documentation
diff --git a/docs/sources/reference/api/docker_remote_api_v1.15.md b/docs/sources/reference/api/docker_remote_api_v1.15.md
index 71ec43179c..7563fed1e6 100644
--- a/docs/sources/reference/api/docker_remote_api_v1.15.md
+++ b/docs/sources/reference/api/docker_remote_api_v1.15.md
@@ -1052,7 +1052,7 @@ Build an image from Dockerfile via stdin
 **Example response**:
 
         HTTP/1.1 200 OK
-        Content-Type: application/json
+        Content-Type: application/x-json-stream
 
         {"stream":"Step 1..."}
         {"stream":"..."}
@@ -1279,7 +1279,7 @@ via polling (using since)
 **Example response**:
 
         HTTP/1.1 200 OK
-        Content-Type: application/json
+        Content-Type: application/x-json-stream
 
         {"status":"create","id":"dfdf82bd3881","from":"base:latest","time":1374067924}
         {"status":"start","id":"dfdf82bd3881","from":"base:latest","time":1374067924}