diff --git a/RNS/Interfaces/BackboneInterface.py b/RNS/Interfaces/BackboneInterface.py
index e1cba709..0daa2a04 100644
--- a/RNS/Interfaces/BackboneInterface.py
+++ b/RNS/Interfaces/BackboneInterface.py
@@ -1031,7 +1031,7 @@ class BackboneClientInterface(Interface):
     def process_outgoing(self, data):
         if self.online and not self.detached:
             try:
-                frame = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
+                frame = HDLC.frame(data)
                 if self.tx_stalled or not self.transmit_buffer.append(frame, self.tx_hwm):
                     self.tx_drops += 1
                     self.tx_dropped_bytes += len(frame)
diff --git a/RNS/Interfaces/LocalInterface.py b/RNS/Interfaces/LocalInterface.py
index 18957d7d..92bd4086 100644
--- a/RNS/Interfaces/LocalInterface.py
+++ b/RNS/Interfaces/LocalInterface.py
@@ -218,7 +218,7 @@ class LocalClientInterface(Interface):
         if self.online:
             try:
                 if self.epoll_backend:
-                    frame = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
+                    frame = HDLC.frame(data)
                     if self.tx_stalled or not self.transmit_buffer.append(frame, self.tx_hwm):
                         self.tx_drops += 1
                         self.tx_dropped_bytes += len(frame)
@@ -235,7 +235,7 @@ class LocalClientInterface(Interface):
                             s = len(data) / self.bitrate * 8
                             time.sleep(s)
 
-                    data = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
+                    data = HDLC.frame(data)
                     self.socket.sendall(data)
                     self.writing = False
                     self.txb += len(data)
diff --git a/RNS/Interfaces/util/HDLC.py b/RNS/Interfaces/util/HDLC.py
index ab0f1735..bd7fd976 100644
--- a/RNS/Interfaces/util/HDLC.py
+++ b/RNS/Interfaces/util/HDLC.py
@@ -50,6 +50,15 @@ class HDLC():
         frame = frame.replace(HDLC.ESCPD_ESC,  HDLC.ESC_B)
         return frame
 
+    @staticmethod
+    def frame(data):
+        esc         = HDLC.escape(data)
+        frame       = bytearray(len(esc)+2)
+        frame[0]    = HDLC.FLAG
+        frame[1:-1] = esc
+        frame[-1]   = HDLC.FLAG
+        return frame
+
 class ReceiveBuffer():
     def __init__(self, mtu, min_frame_len, max_frame_len=None, on_frame=None, on_invalid=None):
         self._mtu           = mtu