diff --git a/include/wx/private/socket.h b/include/wx/private/socket.h
index 56a3cef528..fe3d3b2df0 100644
--- a/include/wx/private/socket.h
+++ b/include/wx/private/socket.h
@@ -65,7 +65,7 @@
 // 64 bit Cygwin can't use the standard struct timeval because it has long
 // fields, which are supposed to be 32 bits in Win64 API, but long is 64 bits
 // in 64 bit Cygwin, so we need to use its special __ms_timeval instead.
-#if defined(__CYGWIN__) && defined(__LP64__)
+#if defined(__CYGWIN__) && defined(__LP64__) && defined(__WINDOWS__)
     typedef __ms_timeval wxTimeVal_t;
 #else
     typedef timeval wxTimeVal_t;