diff --git a/dlls/ntdll/unix/socket.c b/dlls/ntdll/unix/socket.c
index 6969f411955..e09bf34b07d 100644
--- a/dlls/ntdll/unix/socket.c
+++ b/dlls/ntdll/unix/socket.c
@@ -54,7 +54,9 @@
 #  include <linux/types.h>
 # endif
 # include <linux/ipx.h>
-# define HAS_IPX
+# ifdef SOL_IPX
+#  define HAS_IPX
+# endif
 #endif
 
 #ifdef HAVE_LINUX_IRDA_H