diff --git a/server/src/lib/targets/milestones.ts b/server/src/lib/targets/milestones.ts
index f538f77b2..09e3d7679 100644
--- a/server/src/lib/targets/milestones.ts
+++ b/server/src/lib/targets/milestones.ts
@@ -206,6 +206,7 @@ export async function SubscribeToMilestone(
 		playtype: milestone.playtype,
 		achieved: result.achieved,
 		timeAchieved: result.achieved ? Date.now() : null,
+		lastInteraction: null,
 	};
 
 	// @optimisable, EvaluateMilestoneProgress calculates the users progress