diff --git a/README.md b/README.md
index 8cb3ddc..c5fb3c6 100644
--- a/README.md
+++ b/README.md
@@ -129,16 +129,16 @@ Host: tus.example.com
 HTTP/1.1 200 Ok
 Content-Length: 100
 Content-Type: image/jpg
-X-Missing: bytes=20-50,60-99
+Range: bytes=0-20,40-99
 ```
 
-The `X-Missing` header holds a [byte
+The `Range` header holds a [byte
 range](http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1) that
-informs the client which parts of the file have not been received yet. It is
+informs the client which parts of the file have been received so far. It is
 up to the client to choose appropiate `PUT` requests to complete the upload.
 
-The absence of a `X-Missing` header means that the the entire file has been
-received by the server.
+A completed upload will be indicated by a single range covering the entire file
+size (e.g. `Range: bytes=0-99` for a 100 byte file).
 
 ### GET \<fileUrl\>
 
diff --git a/src/cmd/tusd/data.go b/src/cmd/tusd/data.go
index 756761b..3da2227 100644
--- a/src/cmd/tusd/data.go
+++ b/src/cmd/tusd/data.go
@@ -123,23 +123,3 @@ func getReceivedChunks(fileId string) (chunkSet, error) {
 
 	return chunks, nil
 }
-
-func getMissingChunks(fileId string) (chunkSet, error) {
-	d := dataPath(fileId)
-	stat, err := os.Stat(d)
-	if err != nil {
-		return nil, err
-	}
-
-	receivedChunks, err := getReceivedChunks(fileId)
-	if err != nil {
-		return nil, err
-	}
-
-	// @TODO actually calcuate missing chunks instead of received
-	_ = stat
-
-	//chunks := chunkSet{{Start: 0, End: stat.Size()-1}}
-	//chunks := make(chunkSet, 0)
-	return receivedChunks, nil
-}
diff --git a/src/cmd/tusd/http.go b/src/cmd/tusd/http.go
index c51b94d..3aa16cb 100644
--- a/src/cmd/tusd/http.go
+++ b/src/cmd/tusd/http.go
@@ -102,21 +102,21 @@ func putFile(w http.ResponseWriter, r *http.Request, fileId string) {
 }
 
 func headFile(w http.ResponseWriter, r *http.Request, fileId string) {
-	chunks, err := getMissingChunks(fileId)
+	chunks, err := getReceivedChunks(fileId)
 	if err != nil {
 		reply(w, http.StatusInternalServerError, err.Error())
 		return
 	}
 
-	missing := ""
+	received := ""
 	for i, chunk := range chunks {
-		missing += fmt.Sprintf("%d-%d", chunk.Start, chunk.End)
+		received += fmt.Sprintf("%d-%d", chunk.Start, chunk.End)
 		if i + 1 < len(chunks) {
-			missing += ","
+			received += ","
 		}
 	}
 
-	if missing != "" {
-		w.Header().Set("X-Missing", "bytes="+missing)
+	if received != "" {
+		w.Header().Set("Range", "bytes="+received)
 	}
 }