diff --git a/services/accountmanager/dirk/parameters.go b/services/accountmanager/dirk/parameters.go
index 4efac14..a8b0e91 100644
--- a/services/accountmanager/dirk/parameters.go
+++ b/services/accountmanager/dirk/parameters.go
@@ -156,17 +156,14 @@ func parseAndCheckParameters(params ...Parameter) (*parameters, error) {
 		}
 	}
 
-	if parameters.processConcurrency == 0 {
-		return nil, errors.New("no process concurrency specified")
-	}
 	if parameters.monitor == nil {
 		return nil, errors.New("no monitor specified")
 	}
 	if parameters.clientMonitor == nil {
 		return nil, errors.New("no client monitor specified")
 	}
-	if parameters.processConcurrency <= 0 {
-		return nil, errors.New("process concurrency must be > 0")
+	if parameters.processConcurrency < 1 {
+		return nil, errors.New("no process concurrency specified")
 	}
 	if len(parameters.endpoints) == 0 {
 		return nil, errors.New("no endpoints specified")
diff --git a/services/accountmanager/dirk/service_test.go b/services/accountmanager/dirk/service_test.go
index f5b1273..ab1d0a4 100644
--- a/services/accountmanager/dirk/service_test.go
+++ b/services/accountmanager/dirk/service_test.go
@@ -108,7 +108,7 @@ func TestService(t *testing.T) {
 				dirk.WithFarFutureEpochProvider(farFutureEpochProvider),
 				dirk.WithCurrentEpochProvider(chainTime),
 			},
-			err: "problem with parameters: process concurrency must be > 0",
+			err: "problem with parameters: no process concurrency specified",
 		},
 		{
 			name: "EndpointsNil",
diff --git a/services/synccommitteemessenger/standard/parameters.go b/services/synccommitteemessenger/standard/parameters.go
index 95da047..df3e7a0 100644
--- a/services/synccommitteemessenger/standard/parameters.go
+++ b/services/synccommitteemessenger/standard/parameters.go
@@ -150,7 +150,7 @@ func parseAndCheckParameters(params ...Parameter) (*parameters, error) {
 		}
 	}
 
-	if parameters.processConcurrency == 0 {
+	if parameters.processConcurrency < 1 {
 		return nil, errors.New("no process concurrency specified")
 	}
 	if parameters.monitor == nil {