diff --git a/args.go b/args.go
index 9a84509..f0778ee 100644
--- a/args.go
+++ b/args.go
@@ -163,7 +163,7 @@ func (a *Args) SetBytesV(key string, value []byte) {
 
 // SetBytesKV sets 'key=value' argument.
 func (a *Args) SetBytesKV(key, value []byte) {
-	a.args = setArg(a.args, key, value)
+	a.args = setArgBytes(a.args, key, value)
 }
 
 // Peek returns query arg value for the given key.
@@ -300,7 +300,7 @@ func delAllArgs(args []argsKV, key []byte) []argsKV {
 	return args
 }
 
-func setArg(h []argsKV, key, value []byte) []argsKV {
+func setArgBytes(h []argsKV, key, value []byte) []argsKV {
 	n := len(h)
 	for i := 0; i < n; i++ {
 		kv := &h[i]
diff --git a/header.go b/header.go
index 84c4dd1..0837d1d 100644
--- a/header.go
+++ b/header.go
@@ -215,7 +215,7 @@ func (h *ResponseHeader) SetContentLength(contentLength int) {
 			h.SetConnectionClose()
 			value = strIdentity
 		}
-		h.h = setArg(h.h, strTransferEncoding, value)
+		h.h = setArgBytes(h.h, strTransferEncoding, value)
 	}
 }
 
@@ -256,7 +256,7 @@ func (h *RequestHeader) SetContentLength(contentLength int) {
 		h.h = delAllArgs(h.h, strTransferEncoding)
 	} else {
 		h.contentLengthBytes = h.contentLengthBytes[:0]
-		h.h = setArg(h.h, strTransferEncoding, strChunked)
+		h.h = setArgBytes(h.h, strTransferEncoding, strChunked)
 	}
 }
 
@@ -882,20 +882,20 @@ func (h *ResponseHeader) SetCanonical(key, value []byte) {
 			h.SetConnectionClose()
 		} else {
 			h.ResetConnectionClose()
-			h.h = setArg(h.h, key, value)
+			h.h = setArgBytes(h.h, key, value)
 		}
 	case "Transfer-Encoding":
 		// Transfer-Encoding is managed automatically.
 	case "Date":
 		// Date is managed automatically.
 	default:
-		h.h = setArg(h.h, key, value)
+		h.h = setArgBytes(h.h, key, value)
 	}
 }
 
 // SetCookie sets the given response cookie.
 func (h *ResponseHeader) SetCookie(cookie *Cookie) {
-	h.cookies = setArg(h.cookies, cookie.Key(), cookie.Cookie())
+	h.cookies = setArgBytes(h.cookies, cookie.Key(), cookie.Cookie())
 }
 
 // SetCookie sets 'key: value' cookies.
@@ -914,7 +914,7 @@ func (h *RequestHeader) SetCookieBytesK(key []byte, value string) {
 func (h *RequestHeader) SetCookieBytesKV(key, value []byte) {
 	h.parseRawHeaders()
 	h.collectCookies()
-	h.cookies = setArg(h.cookies, key, value)
+	h.cookies = setArgBytes(h.cookies, key, value)
 }
 
 // Set sets the given 'key: value' header.
@@ -966,12 +966,12 @@ func (h *RequestHeader) SetCanonical(key, value []byte) {
 			h.SetConnectionClose()
 		} else {
 			h.ResetConnectionClose()
-			h.h = setArg(h.h, key, value)
+			h.h = setArgBytes(h.h, key, value)
 		}
 	case "Transfer-Encoding":
 		// Transfer-Encoding is managed automatically.
 	default:
-		h.h = setArg(h.h, key, value)
+		h.h = setArgBytes(h.h, key, value)
 	}
 }
 
@@ -1594,7 +1594,7 @@ func (h *ResponseHeader) parseHeaders(buf []byte) (int, error) {
 		case "Transfer-Encoding":
 			if !bytes.Equal(s.value, strIdentity) {
 				h.contentLength = -1
-				h.h = setArg(h.h, strTransferEncoding, strChunked)
+				h.h = setArgBytes(h.h, strTransferEncoding, strChunked)
 			}
 		case "Set-Cookie":
 			h.cookies, kv = allocArg(h.cookies)
@@ -1620,7 +1620,7 @@ func (h *ResponseHeader) parseHeaders(buf []byte) (int, error) {
 		h.contentLengthBytes = h.contentLengthBytes[:0]
 	}
 	if h.contentLength == -2 && !h.ConnectionUpgrade() && !h.mustSkipContentLength() {
-		h.h = setArg(h.h, strTransferEncoding, strIdentity)
+		h.h = setArgBytes(h.h, strTransferEncoding, strIdentity)
 		h.connectionClose = true
 	}
 	if h.noHTTP11 && !h.connectionClose {
@@ -1658,7 +1658,7 @@ func (h *RequestHeader) parseHeaders(buf []byte) (int, error) {
 		case "Transfer-Encoding":
 			if !bytes.Equal(s.value, strIdentity) {
 				h.contentLength = -1
-				h.h = setArg(h.h, strTransferEncoding, strChunked)
+				h.h = setArgBytes(h.h, strTransferEncoding, strChunked)
 			}
 		case "Connection":
 			if bytes.Equal(s.value, strClose) {