2 files changed, 9 insertions, 0 deletions
diff --git a/src/os/win32/ngx_files.c b/src/os/win32/ngx_files.c
index 70cab2f1c..3bb79b89e 100644
--- a/src/os/win32/ngx_files.c
+++ b/src/os/win32/ngx_files.c
@@ -477,6 +477,13 @@ ngx_de_link_info(u_char *name, ngx_dir_t *dir)
 
 
 ngx_int_t
+ngx_read_ahead(ngx_fd_t fd, size_t n)
+{
+    return ~NGX_FILE_ERROR;
+}
+
+
+ngx_int_t
 ngx_directio_on(ngx_fd_t fd)
 {
     return ~NGX_FILE_ERROR;
diff --git a/src/os/win32/ngx_files.h b/src/os/win32/ngx_files.h
index 950bd98a2..605eee85e 100644
--- a/src/os/win32/ngx_files.h
+++ b/src/os/win32/ngx_files.h
@@ -232,6 +232,8 @@ ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size,
 ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *ce,
     off_t offset, ngx_pool_t *pool);
 
+ngx_int_t ngx_read_ahead(ngx_fd_t fd, size_t n);
+#define ngx_read_ahead_n            "ngx_read_ahead_n"
 
 ngx_int_t ngx_directio_on(ngx_fd_t fd);
 #define ngx_directio_on_n           "ngx_directio_on_n"