diff --git a/youtube_dl/blowfish.py b/youtube_dl/blowfish.py
index 200015db0..24c0125f0 100644
--- a/youtube_dl/blowfish.py
+++ b/youtube_dl/blowfish.py
@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-import struct
+from compat import compat_struct_unpack, compat_struct_pack
 
 # Blowfish implementation, translated from original C code by Bruce Schneier.
 
@@ -292,9 +292,9 @@ def blowfish_cbc_decrypt(data, key, iv):
     """
     fmt = ">%dL" % (len(data) // 4)
     c = Blowfish(key)
-    ivl, ivr = struct.unpack(">LL", iv)
+    ivl, ivr = compat_struct_unpack(">LL", iv)
     out = []
-    ind = struct.unpack(fmt, data)
+    ind = compat_struct_unpack(fmt, data)
 
     for i in range(0, len(ind), 2):
         l, r = c.decipher(ind[i], ind[i + 1])
@@ -305,7 +305,7 @@ def blowfish_cbc_decrypt(data, key, iv):
         out.append(l)
         out.append(r)
 
-    return struct.pack(fmt, *out)
+    return compat_struct_pack(fmt, *out)
 
 
 __all__ = ['blowfish_cbc_decrypt']