diff --git a/application/controllers/info_amp.php b/application/controllers/info_amp.php
index 29d77e76..c3b40737 100644
--- a/application/controllers/info_amp.php
+++ b/application/controllers/info_amp.php
@@ -462,7 +462,7 @@ class Info_amp extends CI_Controller
                 $yarnbin = 'C:\Users\cht77\AppData\Local\Yarn\bin\mammoth ';
                 $test_host = '//202.103.68.62:9096';
             } else {
-                $yarnbin = realpath(APPPATH . 'mammoth/mammoth ');
+                $yarnbin = realpath(APPPATH . 'mammoth/mammoth') + ' ';
                 $test_host = '';
             }
             $command = $yarnbin . $docx_path . ' --output-dir=' . $img_dir . ' 2>&1';