diff --git a/pkg/provider/docker/config.go b/pkg/provider/docker/config.go
index ccb293820..ac179b096 100644
--- a/pkg/provider/docker/config.go
+++ b/pkg/provider/docker/config.go
@@ -126,7 +126,7 @@ func (p *Provider) keepContainer(ctx context.Context, container dockerData) bool
 
 	matches, err := constraints.Match(container.Labels, p.Constraints)
 	if err != nil {
-		logger.Error("Error matching constraints expression: %v", err)
+		logger.Errorf("Error matching constraints expression: %v", err)
 		return false
 	}
 	if !matches {
diff --git a/pkg/provider/marathon/config.go b/pkg/provider/marathon/config.go
index 84f98b256..1624390af 100644
--- a/pkg/provider/marathon/config.go
+++ b/pkg/provider/marathon/config.go
@@ -186,7 +186,7 @@ func (p *Provider) keepApplication(ctx context.Context, extraConf configuration,
 	// Filter by constraints.
 	matches, err := constraints.Match(labels, p.Constraints)
 	if err != nil {
-		logger.Error("Error matching constraints expression: %v", err)
+		logger.Errorf("Error matching constraints expression: %v", err)
 		return false
 	}
 	if !matches {
diff --git a/pkg/provider/rancher/config.go b/pkg/provider/rancher/config.go
index 3eeae9a37..3eb15ee69 100644
--- a/pkg/provider/rancher/config.go
+++ b/pkg/provider/rancher/config.go
@@ -123,7 +123,7 @@ func (p *Provider) keepService(ctx context.Context, service rancherData) bool {
 
 	matches, err := constraints.Match(service.Labels, p.Constraints)
 	if err != nil {
-		logger.Error("Error matching constraints expression: %v", err)
+		logger.Errorf("Error matching constraints expression: %v", err)
 		return false
 	}
 	if !matches {