diff --git a/roles/common/defaults/main.yml b/roles/common/defaults/main.yml
index a13792dab9b7d216427e296eced01dcc515cd924..adf22ea0ba74fcdc7ffd02b81c35aca663f3c8d7 100644
--- a/roles/common/defaults/main.yml
+++ b/roles/common/defaults/main.yml
@@ -17,6 +17,7 @@ pip_check_requirements:
   - first==2.0.1
   - pip-tools==1.9.0
   - six==1.10.0
+ntp_servers: []
 
 # Internal use only.
 prompt_colour_mapping:
@@ -36,4 +37,4 @@ prompt_colour_mapping:
   light_purple: "1;35"
   light_cyan: "1;36"
   white: "1;37"
-  none: "0"
\ No newline at end of file
+  none: "0"