diff --git a/misc/miscfn.h b/misc/miscfn.h
index 6f6fb66fd..3d174cef1 100644
--- a/misc/miscfn.h
+++ b/misc/miscfn.h
@@ -19,4 +19,12 @@
 char *realpath(char *path, char resolved_path[]);
 #endif
 
+#if ! HAVE_S_ISLNK
+#define S_ISLNK(mode) ((mode) & S_IFLNK)
+#endif
+
+#if ! HAVE_S_ISSOCK
+#define S_ISSOCK(mode) ((mode) & S_IFSOCK)
+#endif
+
 #endif