diff --git a/contrib/sockets/sockets.lisp b/contrib/sockets/sockets.lisp
index 3eb916980..517c5c69b 100644
--- a/contrib/sockets/sockets.lisp
+++ b/contrib/sockets/sockets.lisp
@@ -47,7 +47,7 @@
  "#define MSG_WAITALL 0")
 #+:wsock
 (clines
- #+(and :msvc (not :threads))
+ #+(and (or :msvc :mingw32) (not :threads))
  "#include <winsock2.h>"
  "typedef unsigned int uint32_t;"
  #-:mingw32