diff --git a/src/epoll.c b/src/epoll.c
index f0a2c1a..2f318d4 100644
--- a/src/epoll.c
+++ b/src/epoll.c
@@ -8,6 +8,7 @@
 #include <stdio.h>
 
 #include "epoll.h"
+#include "error.h"
 #include "msafd.h"
 #include "tree.h"
 
@@ -50,7 +51,6 @@ static int epoll__submit_poll_req(epoll_port_data_t* port_data,
 static int epoll__afd_poll(SOCKET socket,
                            AFD_POLL_INFO* info,
                            OVERLAPPED* overlapped);
-static int epoll__ntstatus_to_winsock_error(NTSTATUS status);
 
 static int epoll__initialized = 0;
 static PNTDEVICEIOCONTROLFILE pNtDeviceIoControlFile;
@@ -791,7 +791,7 @@ int epoll__afd_poll(SOCKET socket,
       break;
 
     default:
-      error = epoll__ntstatus_to_winsock_error(status);
+      error = we_map_ntstatus_to_winsock_error(status);
       break;
   }
 
@@ -803,120 +803,3 @@ int epoll__afd_poll(SOCKET socket,
     return SOCKET_ERROR;
   }
 }
-
-int epoll__ntstatus_to_winsock_error(NTSTATUS status) {
-  switch (status) {
-    case STATUS_SUCCESS:
-      return ERROR_SUCCESS;
-
-    case STATUS_PENDING:
-      return ERROR_IO_PENDING;
-
-    case STATUS_INVALID_HANDLE:
-    case STATUS_OBJECT_TYPE_MISMATCH:
-      return WSAENOTSOCK;
-
-    case STATUS_INSUFFICIENT_RESOURCES:
-    case STATUS_PAGEFILE_QUOTA:
-    case STATUS_COMMITMENT_LIMIT:
-    case STATUS_WORKING_SET_QUOTA:
-    case STATUS_NO_MEMORY:
-    case STATUS_CONFLICTING_ADDRESSES:
-    case STATUS_QUOTA_EXCEEDED:
-    case STATUS_TOO_MANY_PAGING_FILES:
-    case STATUS_REMOTE_RESOURCES:
-    case STATUS_TOO_MANY_ADDRESSES:
-      return WSAENOBUFS;
-
-    case STATUS_SHARING_VIOLATION:
-    case STATUS_ADDRESS_ALREADY_EXISTS:
-      return WSAEADDRINUSE;
-
-    case STATUS_LINK_TIMEOUT:
-    case STATUS_IO_TIMEOUT:
-    case STATUS_TIMEOUT:
-      return WSAETIMEDOUT;
-
-    case STATUS_GRACEFUL_DISCONNECT:
-      return WSAEDISCON;
-
-    case STATUS_REMOTE_DISCONNECT:
-    case STATUS_CONNECTION_RESET:
-    case STATUS_LINK_FAILED:
-    case STATUS_CONNECTION_DISCONNECTED:
-    case STATUS_PORT_UNREACHABLE:
-    case STATUS_HOPLIMIT_EXCEEDED:
-      return WSAECONNRESET;
-
-    case STATUS_LOCAL_DISCONNECT:
-    case STATUS_TRANSACTION_ABORTED:
-    case STATUS_CONNECTION_ABORTED:
-      return WSAECONNABORTED;
-
-    case STATUS_BAD_NETWORK_PATH:
-    case STATUS_NETWORK_UNREACHABLE:
-    case STATUS_PROTOCOL_UNREACHABLE:
-      return WSAENETUNREACH;
-
-    case STATUS_HOST_UNREACHABLE:
-      return WSAEHOSTUNREACH;
-
-    case STATUS_CANCELLED:
-    case STATUS_REQUEST_ABORTED:
-      return WSAEINTR;
-
-    case STATUS_BUFFER_OVERFLOW:
-    case STATUS_INVALID_BUFFER_SIZE:
-      return WSAEMSGSIZE;
-
-    case STATUS_BUFFER_TOO_SMALL:
-    case STATUS_ACCESS_VIOLATION:
-      return WSAEFAULT;
-
-    case STATUS_DEVICE_NOT_READY:
-    case STATUS_REQUEST_NOT_ACCEPTED:
-      return WSAEWOULDBLOCK;
-
-    case STATUS_INVALID_NETWORK_RESPONSE:
-    case STATUS_NETWORK_BUSY:
-    case STATUS_NO_SUCH_DEVICE:
-    case STATUS_NO_SUCH_FILE:
-    case STATUS_OBJECT_PATH_NOT_FOUND:
-    case STATUS_OBJECT_NAME_NOT_FOUND:
-    case STATUS_UNEXPECTED_NETWORK_ERROR:
-      return WSAENETDOWN;
-
-    case STATUS_INVALID_CONNECTION:
-      return WSAENOTCONN;
-
-    case STATUS_REMOTE_NOT_LISTENING:
-    case STATUS_CONNECTION_REFUSED:
-      return WSAECONNREFUSED;
-
-    case STATUS_PIPE_DISCONNECTED:
-      return WSAESHUTDOWN;
-
-    case STATUS_INVALID_ADDRESS:
-    case STATUS_INVALID_ADDRESS_COMPONENT:
-      return WSAEADDRNOTAVAIL;
-
-    case STATUS_NOT_SUPPORTED:
-    case STATUS_NOT_IMPLEMENTED:
-      return WSAEOPNOTSUPP;
-
-    case STATUS_ACCESS_DENIED:
-      return WSAEACCES;
-
-    default:
-      if ((status & (FACILITY_NTWIN32 << 16)) == (FACILITY_NTWIN32 << 16) &&
-          (status & (ERROR_SEVERITY_ERROR | ERROR_SEVERITY_WARNING))) {
-        /* It's a windows error that has been previously mapped to an
-         * ntstatus code.
-         */
-        return (DWORD)(status & 0xffff);
-      } else {
-        /* The default fallback for unmappable ntstatus codes. */
-        return WSAEINVAL;
-      }
-  }
-}