diff --git a/src/benchmark/benchmark.conf b/src/benchmark/benchmark.conf
index fba3e0aa6..bb1f17f83 100644
--- a/src/benchmark/benchmark.conf
+++ b/src/benchmark/benchmark.conf
@@ -8,6 +8,7 @@ taler_test_home = exchange_benchmark_home/
 [taler]
 # Currency supported by the exchange (can only be one)
 currency = EUR
+CURRENCY_ROUND_UNIT = EUR:0.01
 
 [exchange]
 # how long is one signkey valid?