diff --git a/examples/master/repository/speed_benchmark.py b/examples/master/repository/speed_benchmark.py
index 8cc61aaba..fbd081f1c 100644
--- a/examples/master/repository/speed_benchmark.py
+++ b/examples/master/repository/speed_benchmark.py
@@ -78,7 +78,8 @@ class SpeedBenchmark(EnvExperiment):
                                                            "CoreSend100Ints",
                                                            "CoreSend1MB",
                                                            "CorePrimes"]))
-        self.setattr_argument("nruns", NumberValue(10, min=1, max=1000, ndecimals=0))
+        self.setattr_argument("nruns", NumberValue(10, min=1, max=1000,
+                                                   ndecimals=0, step=1))
         self.setattr_device("core")
         self.setattr_device("scheduler")