diff --git a/debian/control-modules b/debian/control-modules
index f50a76793c..866355ddb8 100644
--- a/debian/control-modules
+++ b/debian/control-modules
@@ -223,6 +223,7 @@ Description: Voicemail detection
  This module detects voicemail beeps at any frequency in O(1) time.
 
 Module: applications/mod_voicemail
+Depends: mail-transport-agent
 Description: Voicemail
  This module provides a voicemail system.