diff --git a/dll/win32/msafd/misc/dllmain.c b/dll/win32/msafd/misc/dllmain.c
index abb184f8e34..4f01f6f2883 100644
--- a/dll/win32/msafd/misc/dllmain.c
+++ b/dll/win32/msafd/misc/dllmain.c
@@ -2900,7 +2900,7 @@ WSPSetSockOpt(
               GetSocketInformation(Socket,
                                    AFD_INFO_RECEIVE_WINDOW_SIZE,
                                    NULL,
-                                   &Socket->SharedData->SizeOfSendBuffer,
+                                   &Socket->SharedData->SizeOfRecvBuffer,
                                    NULL,
                                    NULL,
                                    NULL);