fix log message
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 7e84070..1edac54 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -58,7 +58,11 @@
 
 
 ssize_t ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset);
+#if (NGX_HAVE_PREAD)
+#define ngx_read_file_n          "pread()"
+#else
 #define ngx_read_file_n          "read()"
+#endif
 
 ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size,
     off_t offset);