diff --git a/harbour/source/rtl/filesys.c b/harbour/source/rtl/filesys.c
index 79c88c3526..a8d94406f5 100644
--- a/harbour/source/rtl/filesys.c
+++ b/harbour/source/rtl/filesys.c
@@ -111,22 +111,6 @@
 #ifndef SH_DENYNO
    #define SH_DENYNO    0x40    /* Deny nothing */
 #endif
-/*
- * These are all the msc flags
-#define _O_RDONLY       0x0000  /* open for reading only */
-#define _O_WRONLY       0x0001  /* open for writing only */
-#define _O_RDWR         0x0002  /* open for reading and writing */
-#define _O_APPEND       0x0008  /* writes done at eof */
-#define _O_RANDOM       0x0010  /* file access is primarily random */
-#define _O_SEQUENTIAL   0x0020  /* file access is primarily sequential */
-#define _O_TEMPORARY    0x0040  /* temporary file bit */
-#define _O_NOINHERIT    0x0080  /* child process doesn't inherit file */
-#define _O_CREAT        0x0100  /* create and open file */
-#define _O_TRUNC        0x0200  /* open and truncate */
-#define _O_EXCL         0x0400  /* open only if file doesn't already exist */
-#define _O_SHORT_LIVED  0x1000  /* temporary storage file, try not to flush */
-#define _O_TEXT         0x4000  /* file mode is text (translated) */
-#define _O_BINARY       0x8000  /* file mode is binary (untranslated) */
 
 static USHORT s_uiErrorLast = 0;