diff --git a/arch/nt32/bits/mman.h b/arch/nt32/bits/mman.h
index 0f53acb..846b7ea 100644
--- a/arch/nt32/bits/mman.h
+++ b/arch/nt32/bits/mman.h
@@ -4,8 +4,8 @@
 #define	PROT_READ      1
 #define	PROT_WRITE     2
 #define	PROT_EXEC      4
-#define	PROT_GROWSDOWN 0x01000000
-#define	PROT_GROWSUP   0x02000000
+#define PROT_GROWSDOWN  0x01000000
+#define PROT_GROWSUP    0x02000000
 
 #define	MAP_SHARED     0x01
 #define	MAP_PRIVATE    0x02