diff --git a/akka-cluster/src/main/scala/akka/cluster/AccrualFailureDetector.scala b/akka-cluster/src/main/scala/akka/cluster/AccrualFailureDetector.scala
index 6632111f00..62d5fa4eb9 100644
--- a/akka-cluster/src/main/scala/akka/cluster/AccrualFailureDetector.scala
+++ b/akka-cluster/src/main/scala/akka/cluster/AccrualFailureDetector.scala
@@ -165,8 +165,7 @@ class AccrualFailureDetector(
         else PhiFactor * timestampDiff / mean
       }
 
-    // FIXME change to debug log level, when failure detector is stable
-    log.info("Phi value [{}] and threshold [{}] for connection [{}] ", phi, threshold, connection)
+    log.debug("Phi value [{}] and threshold [{}] for connection [{}] ", phi, threshold, connection)
     phi
   }