diff --git a/setup.py b/setup.py
index d30343e..f469a20 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@
                                  libraries=libraries))
     ext_modules.append(Extension("thriftpy2.transport.sasl.cysasl",
                                  ["thriftpy2/transport/sasl/cysasl.c"]))
-    ext_modules.append(Extension("thriftpy2.protocol.cybin",
+    ext_modules.append(Extension("thriftpy2.protocol.cybin.cybin",
                                  ["thriftpy2/protocol/cybin/cybin.c"],
                                  libraries=libraries))
 
diff --git a/thriftpy2/protocol/cybin/__init__.py b/thriftpy2/protocol/cybin/__init__.py
new file mode 100644
index 0000000..82a0121
--- /dev/null
+++ b/thriftpy2/protocol/cybin/__init__.py
@@ -0,0 +1 @@
+from .cybin import *
diff --git a/thriftpy2/protocol/cybin/cybin.pyx b/thriftpy2/protocol/cybin/cybin.pyx
index 97d6ec9..3532605 100644
--- a/thriftpy2/protocol/cybin/cybin.pyx
+++ b/thriftpy2/protocol/cybin/cybin.pyx
@@ -7,10 +7,9 @@ from cpython cimport bool
 
 import six
 
+from thriftpy2.thrift import TDecodeException
 from thriftpy2.transport.cybase cimport CyTransportBase, STACK_STRING_LEN
 
-from ..thrift import TDecodeException
-
 cdef extern from "endian_port.h":
     int16_t htobe16(int16_t n)
     int32_t htobe32(int32_t n)