diff --git a/core/sandbox_stop.go b/core/sandbox_stop.go
index a58f640e3..1bcd1fbbc 100644
--- a/core/sandbox_stop.go
+++ b/core/sandbox_stop.go
@@ -63,7 +63,7 @@ func (ds *dockerService) StopPodSandbox(
 			}
 			if libdocker.IsContainerNotFoundError(statusErr) {
 				logrus.Infof(
-					"Both sandbox container and checkpoint could not be found with id %d. " +
+					"Both sandbox container and checkpoint could not be found with id %q. " +
 					"Proceed without further sandbox information.", podSandboxID)
 			} else {
 				return nil, errors.NewAggregate([]error{
diff --git a/core/stats.go b/core/stats.go
index 2ec4372cb..615db6e80 100644
--- a/core/stats.go
+++ b/core/stats.go
@@ -53,7 +53,7 @@ func (ds *dockerService) ListContainerStats(
 	listResp, err := ds.ListContainers(ctx, &runtimeapi.ListContainersRequest{Filter: filter})
 	if err != nil {
 		logrus.Errorf("Error listing containers with filter: %+v", filter)
-		logrus.Errorf("Error listing containers error: ", err)
+		logrus.Errorf("Error listing containers error: %s", err)
 		return nil, err
 	}