diff --git a/chronos/transports/common.nim b/chronos/transports/common.nim
index 0b3f431..66eef1b 100644
--- a/chronos/transports/common.nim
+++ b/chronos/transports/common.nim
@@ -21,8 +21,7 @@ from std/net import Domain, `==`, IpAddress, IpAddressFamily, parseIpAddress,
 from std/nativesockets import toInt, `$`
 
 export Domain, `==`, IpAddress, IpAddressFamily, parseIpAddress, SockType,
-       Protocol, Port, toInt, `$`
-
+       Protocol, Port, toInt, `$`, osdefs
 
 const
   DefaultStreamBufferSize* = 4096    ## Default buffer size for stream