diff --git a/vagrant.json b/vagrant.json
index 874bae00578940146aa35316a7f46c73dac74233..4c0b8f59818a41aa988debcf2082470b7358e89a 100644
--- a/vagrant.json
+++ b/vagrant.json
@@ -134,7 +134,7 @@
             "scripts": [
                 "provision/write_zeroes.sh"
             ],
-            "execute_command": "if [ ! -z \"{{user `write_zeroes`}}\" ]; echo 'vagrant'|sudo -S sh '{{.Path}}'; fi"
+            "execute_command": "if [ ! -z \"{{user `write_zeroes`}}\" ]; then echo 'vagrant'|sudo -S sh '{{.Path}}'; fi"
         }
     ],
     "post-processors": [