ngx_path_separator()
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 63d080b..7d83b04 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -160,6 +160,8 @@
 #define ngx_realpath_n           "realpath()"
 #define ngx_getcwd(buf, size)    (getcwd(buf, size) != NULL)
 #define ngx_getcwd_n             "getcwd()"
+#define ngx_path_separator(c)    ((c) == '/')
+
 #define NGX_MAX_PATH             PATH_MAX
 
 #define NGX_DIR_MASK_LEN         0