diff --git a/libtcc.c b/libtcc.c
index a9a39ac..0f7e476 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -1500,96 +1500,6 @@ LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
     return 0;
 }
 
-
-/* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
- * - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
- * - st_atime, st_ctime: not valid on FAT, valid on NTFS.
- * - Other fields should be reasonably compatible (and S_ISDIR should work).
- *
- * BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
- * - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
- *   - But on NTFS: it's guaranteed to be the same value until the file is deleted.
- * - On windows server 2012 there's a 128b file id, and the 64b one via
- *   nFileIndex* is not guaranteed to be unique.
- *
- * - MS Docs suggest to that volume number with the file index could be used to
- *   check if two handles refer to the same file.
- */
-#ifndef _WIN32
-typedef struct stat                file_info_t;
-#else
-typedef BY_HANDLE_FILE_INFORMATION file_info_t;
-#endif
-
-static  int get_file_info(const char *fname, file_info_t *out_info)
-{
-#ifndef _WIN32
-    return stat(fname, out_info);
-#else
-    int rv = 1;
-    HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
-                          FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
-
-    if (h != INVALID_HANDLE_VALUE) {
-        rv = !GetFileInformationByHandle(h, out_info);
-        CloseHandle(h);
-    }
-    return rv;
-#endif
-}
-
-static int is_dir(file_info_t *info)
-{
-#ifndef _WIN32
-    return S_ISDIR(info->st_mode);
-#else
-    return (info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
-           FILE_ATTRIBUTE_DIRECTORY;
-#endif
-}
-
-static int is_same_file(const file_info_t *fi1, const file_info_t *fi2)
-{
-#ifndef _WIN32
-    return fi1->st_dev == fi2->st_dev &&
-           fi1->st_ino == fi2->st_ino;
-#else
-    return fi1->dwVolumeSerialNumber == fi2->dwVolumeSerialNumber &&
-           fi1->nFileIndexHigh       == fi2->nFileIndexHigh &&
-           fi1->nFileIndexLow        == fi2->nFileIndexLow;
-#endif
-}
-
-static void
-tcc_normalize_inc_dirs_aux(file_info_t *stats, size_t *pnum, char **path)
-{
-    size_t i, num = *pnum;
-    if (get_file_info(*path, &stats[num]) || !is_dir(&stats[num]))
-        goto remove;
-    for (i = 0; i < num; i++)
-        if (is_same_file(&stats[i], &stats[num]))
-            goto remove;
-    *pnum = num + 1;
-    return;
- remove:
-    tcc_free(*path);
-    *path = 0;
-}
-
-/* Remove non-existent and duplicate directories from include paths. */
-ST_FUNC void tcc_normalize_inc_dirs(TCCState *s)
-{
-    file_info_t *stats =
-        tcc_malloc(((size_t)s->nb_sysinclude_paths + s->nb_include_paths) *
-                   sizeof(*stats));
-    size_t i, num = 0;
-    for (i = 0; i < s->nb_sysinclude_paths; i++)
-        tcc_normalize_inc_dirs_aux(stats, &num, &s->sysinclude_paths[i]);
-    for (i = 0; i < s->nb_include_paths; i++)
-        tcc_normalize_inc_dirs_aux(stats, &num, &s->include_paths[i]);
-    tcc_free(stats);
-}
-
 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 {
     s->output_type = output_type;
@@ -1643,8 +1553,6 @@ LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
         tcc_add_crt(s, "crti.o");
     }
 #endif
-    if (s->normalize_inc_dirs)
-        tcc_normalize_inc_dirs(s);
     return 0;
 }
 
@@ -1729,7 +1637,6 @@ static const FlagDef flag_defs[] = {
     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
-    { offsetof(TCCState, normalize_inc_dirs), 0, "normalize-inc-dirs" },
 };
 
 /* set/reset a flag */
diff --git a/tcc-doc.texi b/tcc-doc.texi
index 1dc6f80..a2e9af1 100644
--- a/tcc-doc.texi
+++ b/tcc-doc.texi
@@ -242,11 +242,7 @@ assume a nested named structure declaration without identifier behave
 like an unnamed one.
 
 @item -fdollars-in-identifiers
-Allow a dollars in identifiers.
-
-@item -fnormalize-inc-dirs
-Be more gcc compatible and remove non-existent or duplicate directories
-from include paths. This helps to compile such packages as coreutils.
+Allow a dollars in identifiers
 
 @end table
 
diff --git a/tcc.h b/tcc.h
index d0e0888..0090ce4 100644
--- a/tcc.h
+++ b/tcc.h
@@ -616,7 +616,6 @@ struct TCCState {
     int old_struct_init_code;	/* use old algorithm to init array in struct when there is no '{' used.
 				   Liuux 2.4.26 can't find initrd when compiled with a new algorithm */
     int dollars_in_identifiers;	/* allows '$' char in indentifiers */
-    int normalize_inc_dirs;	/* remove non-existent or duplicate directories from include paths */
 
     /* warning switches */
     int warn_write_strings;
diff --git a/tccpp.c b/tccpp.c
index d4ad514..a3622a7 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -1783,7 +1783,6 @@ ST_FUNC void preprocess(int is_bof)
                 /* search in all the include paths */
                 int j = i - 2, k = j - s1->nb_include_paths;
                 path = k < 0 ? s1->include_paths[j] : s1->sysinclude_paths[k];
-                if (path == 0) continue;
                 pstrcpy(buf1, sizeof(buf1), path);
                 pstrcat(buf1, sizeof(buf1), "/");
             }