diff --git a/src/Prometheus/RegistryInterface.php b/src/Prometheus/RegistryInterface.php
index 28255a27..a66ae5e6 100644
--- a/src/Prometheus/RegistryInterface.php
+++ b/src/Prometheus/RegistryInterface.php
@@ -17,7 +17,7 @@ public function wipeStorage(): void;
     /**
      * @return MetricFamilySamples[]
      */
-    public function getMetricFamilySamples(bool $sortMetrics = true): array;
+    public function getMetricFamilySamples(): array;
 
     /**
      * @param string   $namespace e.g. cms
diff --git a/src/Prometheus/Storage/Adapter.php b/src/Prometheus/Storage/Adapter.php
index 593b09a1..fc39dd81 100644
--- a/src/Prometheus/Storage/Adapter.php
+++ b/src/Prometheus/Storage/Adapter.php
@@ -16,7 +16,7 @@ interface Adapter
     /**
      * @return MetricFamilySamples[]
      */
-    public function collect(bool $sortMetrics = true): array;
+    public function collect(): array;
 
     /**
      * @param mixed[] $data