diff --git a/include/sys/sysmacros.h b/include/sys/sysmacros.h
index 210dfb5c59..35f7cb5c1e 100644
--- a/include/sys/sysmacros.h
+++ b/include/sys/sysmacros.h
@@ -60,7 +60,7 @@
 #define UINT64_MIN			ULLONG_MIN
 
 #define NBBY				8
-#define ENOTSUP				ENOTSUPP
+#define ENOTSUP				EOPNOTSUPP
 
 #define MAXMSGLEN			256
 #define MAXNAMELEN			256