diff --git a/include/sys/stat.h b/include/sys/stat.h
index 6b998184a41..847660307d9 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -62,6 +62,10 @@
 #define S_IRUSR     (1 << 8)
 #define S_IRWXU     (7 << 6)
 
+#define S_IREAD     S_IRUSR    /* Obsolete synonym provided for BSD compatibility. */
+#define S_IWRITE    S_IWUSR    /* Obsolete synonym provided for BSD compatibility. */
+#define S_IEXEC     S_IXUSR    /* Obsolete synonym provided for BSD compatibility. */
+
 #define S_ISVTX     (1 << 9)   /* "Sticky" bit (not used) */
 #define S_ISGID     (1 << 10)  /* Set group ID bit (not used)*/
 #define S_ISUID     (1 << 11)  /* Set UID bit (not used) */