diff --git a/unmaintained/volume_tailer/volume_tailer.go b/unmaintained/volume_tailer/volume_tailer.go
index 9458ea6c7..e93f1cc13 100644
--- a/unmaintained/volume_tailer/volume_tailer.go
+++ b/unmaintained/volume_tailer/volume_tailer.go
@@ -49,7 +49,7 @@ func main() {
 
 			data := n.Data
 			if n.IsCompressed() {
-				if data, err = util2.UnCompressData(data); err != nil {
+				if data, err = util2.DecompressData(data); err != nil {
 					return err
 				}
 			}
diff --git a/weed/operation/chunked_file.go b/weed/operation/chunked_file.go
index 3ee8f5079..653b7bf13 100644
--- a/weed/operation/chunked_file.go
+++ b/weed/operation/chunked_file.go
@@ -56,7 +56,7 @@ func (s ChunkList) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 func LoadChunkManifest(buffer []byte, isCompressed bool) (*ChunkManifest, error) {
 	if isCompressed {
 		var err error
-		if buffer, err = util.UnCompressData(buffer); err != nil {
+		if buffer, err = util.DecompressData(buffer); err != nil {
 			return nil, err
 		}
 	}
diff --git a/weed/operation/upload_content.go b/weed/operation/upload_content.go
index 8c8b02a8f..1ed240836 100644
--- a/weed/operation/upload_content.go
+++ b/weed/operation/upload_content.go
@@ -121,7 +121,7 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 		}
 	} else if isInputGzipped {
 		// just to get the clear data length
-		clearData, err := util.UnCompressData(data)
+		clearData, err := util.DecompressData(data)
 		if err == nil {
 			clearDataLen = len(clearData)
 		}
diff --git a/weed/server/volume_server_handlers_read.go b/weed/server/volume_server_handlers_read.go
index d20cd5670..aff1eab8d 100644
--- a/weed/server/volume_server_handlers_read.go
+++ b/weed/server/volume_server_handlers_read.go
@@ -146,7 +146,7 @@ func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 		if n.IsCompressed() {
 			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
 				if _, _, _, shouldResize := shouldResizeImages(ext, r); shouldResize {
-					if n.Data, err = util.UnCompressData(n.Data); err != nil {
+					if n.Data, err = util.DecompressData(n.Data); err != nil {
 						glog.V(0).Infoln("ungzip error:", err, r.URL.Path)
 					}
 				} else {
@@ -155,7 +155,7 @@ func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 					}
 				}
 			} else {
-				if n.Data, err = util.UnCompressData(n.Data); err != nil {
+				if n.Data, err = util.DecompressData(n.Data); err != nil {
 					glog.V(0).Infoln("ungzip error:", err, r.URL.Path)
 				}
 			}
diff --git a/weed/storage/needle/needle_parse_upload.go b/weed/storage/needle/needle_parse_upload.go
index c1fb10713..67b798821 100644
--- a/weed/storage/needle/needle_parse_upload.go
+++ b/weed/storage/needle/needle_parse_upload.go
@@ -60,7 +60,7 @@ func ParseUpload(r *http.Request, sizeLimit int64) (pu *ParsedUpload, e error) {
 		}
 	}
 	if pu.IsGzipped {
-		if unzipped, e := util.UnCompressData(pu.Data); e == nil {
+		if unzipped, e := util.DecompressData(pu.Data); e == nil {
 			pu.OriginalDataSize = len(unzipped)
 			pu.UncompressedData = unzipped
 			// println("ungzipped data size", len(unzipped))
diff --git a/weed/util/compression.go b/weed/util/compression.go
index ff5e3ad3f..003f06cbf 100644
--- a/weed/util/compression.go
+++ b/weed/util/compression.go
@@ -26,7 +26,7 @@ func GzipData(input []byte) ([]byte, error) {
 	}
 	return buf.Bytes(), nil
 }
-func UnCompressData(input []byte) ([]byte, error) {
+func DecompressData(input []byte) ([]byte, error) {
 	if IsGzippedContent(input) {
 		return ungzipData(input)
 	}
diff --git a/weed/util/http_util.go b/weed/util/http_util.go
index 51748e92a..c67eb3276 100644
--- a/weed/util/http_util.go
+++ b/weed/util/http_util.go
@@ -310,7 +310,7 @@ func readEncryptedUrl(fileUrl string, cipherKey []byte, isContentCompressed bool
 		return fmt.Errorf("decrypt %s: %v", fileUrl, err)
 	}
 	if isContentCompressed {
-		decryptedData, err = UnCompressData(decryptedData)
+		decryptedData, err = DecompressData(decryptedData)
 		if err != nil {
 			return fmt.Errorf("unzip decrypt %s: %v", fileUrl, err)
 		}