diff --git a/c32ncp.c b/c32ncp.c
index eb3d172..475e3f3 100644
--- a/c32ncp.c
+++ b/c32ncp.c
@@ -269,7 +269,7 @@ int c32_ncp87_modify_dos_attributes(char *name,
   *p++ = 0;                  /* namespace DOS */
   *p++ = 0;                  /* reserved */
   c32_put_word_lh(p, 0x0006); p += 2;       /* SA_ALL */
-  c32_put_dword_lh(p, 0x00000004UL); p += 4; /* modify mask: attributes */
+  c32_put_dword_lh(p, 0x00000002UL); p += 4; /* DM_ATTRIBUTES: attributes */
 
   c32_put_dword_lh(p, attrs); p += 4;       /* Attributes */
   memset(p, 0, 34); p += 34;                /* rest of DOS info */