diff --git a/slirp/slirp.h b/slirp/slirp.h
index 226bced429..4bbbba046e 100644
--- a/slirp/slirp.h
+++ b/slirp/slirp.h
@@ -36,7 +36,7 @@ typedef char *caddr_t;
 # include <sys/ioctl.h>
 #endif
 
-#ifdef HAVE_SYS_FILIO_H
+#ifdef __APPLE__
 # include <sys/filio.h>
 #endif
 
diff --git a/slirp/slirp_config.h b/slirp/slirp_config.h
index 0e78e92d94..f1ee927c15 100644
--- a/slirp/slirp_config.h
+++ b/slirp/slirp_config.h
@@ -11,12 +11,6 @@
  * You shouldn't need to touch any of these
  */
 
-/* Define if you have sys/filio.h */
-#undef HAVE_SYS_FILIO_H
-#ifdef __APPLE__
-#define HAVE_SYS_FILIO_H
-#endif
-
 /* Define if the machine is big endian */
 //#undef HOST_WORDS_BIGENDIAN