diff --git a/src/services/metrics-collector.ts b/src/services/metrics-collector.ts
index 861eaca..ccabe19 100644
--- a/src/services/metrics-collector.ts
+++ b/src/services/metrics-collector.ts
@@ -17,7 +17,7 @@ async function collectRoomsActiveMetric(pool: Pool): Promise<void> {
       .select({ count: sql<number>`count(distinct ${roomMembers.roomId})` })
       .from(roomMembers);
 
-    const count = result[0]?.count || 0;
+    const count = Number(result[0]?.count) || 0;
     roomsActiveGauge.set(count);
 
     const duration = (performance.now() - startTime) / 1000;