diff --git a/modules/metrics/src/main/scala/com/evolutiongaming/skafka/metrics/KafkaMetricsCollector.scala b/modules/metrics/src/main/scala/com/evolutiongaming/skafka/metrics/KafkaMetricsCollector.scala
index 57c0f8a1..3b6cd7a1 100644
--- a/modules/metrics/src/main/scala/com/evolutiongaming/skafka/metrics/KafkaMetricsCollector.scala
+++ b/modules/metrics/src/main/scala/com/evolutiongaming/skafka/metrics/KafkaMetricsCollector.scala
@@ -36,10 +36,20 @@ import scala.util.matching.Regex
   */
 class KafkaMetricsCollector[F[_]: Monad: ToTry](
   kafkaClientMetrics: F[Seq[ClientMetric[F]]],
-  prefix: Option[String]               = None,
-  customLabels: List[(String, String)] = List.empty,
+  prefix: Option[String] = None,
+  customLabels: List[(String, String)],
 ) extends Collector {
 
+  // Secondary constructor for backward compatibility. Should be removed in the next major bump
+  def this(
+    kafkaClientMetrics: F[Seq[ClientMetric[F]]],
+    prefix: Option[String]
+  ) = this(
+    kafkaClientMetrics = kafkaClientMetrics,
+    prefix             = prefix,
+    customLabels       = List.empty
+  )
+
   private val (customLabelsKeys, customLabelsValues) = customLabels.separate
 
   protected def getCollectorType(metric: ClientMetric[F]): Collector.Type = {