diff --git a/src/afd.c b/src/afd.c
index 79eb1a0..48b0c4e 100644
--- a/src/afd.c
+++ b/src/afd.c
@@ -116,7 +116,7 @@ static ssize_t _afd_get_protocol_info(SOCKET socket,
                  SO_PROTOCOL_INFOW,
                  (char*) protocol_info,
                  &opt_len) != 0)
-    return_error(-1);
+    return_handle_error(-1, socket);
 
   id = -1;
   for (size_t i = 0; i < array_count(AFD_PROVIDER_GUID_LIST); i++) {
diff --git a/src/error.c b/src/error.c
index 3aec9bb..753a8e1 100644
--- a/src/error.c
+++ b/src/error.c
@@ -95,7 +95,7 @@
   X(WSAENETUNREACH, ENETUNREACH)             \
   X(WSAENOBUFS, ENOMEM)                      \
   X(WSAENOTCONN, ENOTCONN)                   \
-  X(WSAENOTSOCK, EBADF)                      \
+  X(WSAENOTSOCK, ENOTSOCK)                   \
   X(WSAEOPNOTSUPP, EOPNOTSUPP)               \
   X(WSAESHUTDOWN, EPIPE)                     \
   X(WSAETIMEDOUT, ETIMEDOUT)                 \