2 files changed, 4 insertions, 4 deletions
diff --git a/src/os/unix/ngx_files.c b/src/os/unix/ngx_files.c
index d4bf0436f..2154bed49 100644
--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -406,7 +406,7 @@ ngx_directio_on(ngx_fd_t fd)
     flags = fcntl(fd, F_GETFL);
 
     if (flags == -1) {
-        return -1;
+        return NGX_FILE_ERROR;
     }
 
     return fcntl(fd, F_SETFL, flags | O_DIRECT);
@@ -421,7 +421,7 @@ ngx_directio_off(ngx_fd_t fd)
     flags = fcntl(fd, F_GETFL);
 
     if (flags == -1) {
-        return -1;
+        return NGX_FILE_ERROR;
     }
 
     return fcntl(fd, F_SETFL, flags & ~O_DIRECT);
diff --git a/src/os/win32/ngx_files.c b/src/os/win32/ngx_files.c
index bfbb98fb0..70cab2f1c 100644
--- a/src/os/win32/ngx_files.c
+++ b/src/os/win32/ngx_files.c
@@ -479,14 +479,14 @@ ngx_de_link_info(u_char *name, ngx_dir_t *dir)
 ngx_int_t
 ngx_directio_on(ngx_fd_t fd)
 {
-    return 0;
+    return ~NGX_FILE_ERROR;
 }
 
 
 ngx_int_t
 ngx_directio_off(ngx_fd_t fd)
 {
-    return 0;
+    return ~NGX_FILE_ERROR;
 }