diff --git a/src/core/ngx_output_chain.c b/src/core/ngx_output_chain.c
index c4bd67851..db7337cb3 100644
--- a/src/core/ngx_output_chain.c
+++ b/src/core/ngx_output_chain.c
@@ -414,7 +414,7 @@ ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile)
 
         if (n != size) {
             ngx_log_error(NGX_LOG_ALERT, src->file->log, 0,
-                          ngx_read_file_n " reads only %z of %O from file",
+                          ngx_read_file_n " read only %z of %O from file",
                           n, size);
             if (n == 0) {
                 return NGX_ERROR;
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 7e8407086..1edac54af 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -58,7 +58,11 @@ ngx_fd_t ngx_open_tempfile(u_char *name, ngx_uint_t persistent,
 
 
 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);