diff --git a/psk.py b/psk.py
index e7d69e3..b9b8a1f 100644
--- a/psk.py
+++ b/psk.py
@@ -100,11 +100,11 @@
 for k, v in psk.items():
     decode_psk[v] = k
 
-def encode(string):
+def encode(string, sigil):
     result = []
     for c in string:
         result.append(psk[c])
-    return '00'.join(result) + '00'
+    return sigil.join(result) + sigil
 
 def decode(string):
     try:
diff --git a/send.py b/send.py
index 55a94fb..8582e2d 100644
--- a/send.py
+++ b/send.py
@@ -53,7 +53,7 @@ def play_buffer(buffer):
         while True:
             message = user_input("> ")
             try:
-              pattern = psk.encode(message)
+              pattern = psk.encode(message, options.sigil)
               buffer = make_buffer_from_bit_pattern(pattern, FREQ, FREQ_OFF)
               play_buffer(buffer)
             except KeyError: