diff --git a/src/paramset.jl b/src/paramset.jl
index e40e389..5fae650 100644
--- a/src/paramset.jl
+++ b/src/paramset.jl
@@ -26,7 +26,7 @@ function get_n_runs(ps::ParameterSet)::Int
     return n_runs
 end
 
-function get_param_combos(ps::ParameterSet, n_runs::Int=get_n_runs(ps))::Matrix
+function get_param_combos(ps::ParameterSet; n_runs::Int=get_n_runs(ps))::Matrix
     combos = Matrix{Any}(n_runs, ps.n_args)
     P = 1
     for j in 1:ps.n_args
diff --git a/src/strategy.jl b/src/strategy.jl
index f3f8432..1633364 100644
--- a/src/strategy.jl
+++ b/src/strategy.jl
@@ -111,7 +111,7 @@ function optimize(strat::Strategy; samples::Int=0, seed::Int=0, verbose::Bool=tr
     else
         samples = n_runs
     end
-    combos = get_param_combos(strat.indicator.paramset, n_runs)[idx_samples,:]
+    combos = get_param_combos(strat.indicator.paramset, n_runs=n_runs)[idx_samples,:]
     result = zeros(samples)
     for (run, combo) in enumerate(idx_samples)
         verbose ? println("Run $run/$samples") : nothing
@@ -137,7 +137,7 @@ function optimize!(strat::Strategy; samples::Int=0, seed::Int=0, verbose::Bool=t
     else
         samples = n_runs
     end
-    combos = get_param_combos(strat.indicator.paramset, n_runs)[idx_samples,:]
+    combos = get_param_combos(strat.indicator.paramset, n_runs=n_runs)[idx_samples,:]
     strat.results.optimization = zeros(samples,1)
     for (run, combo) in enumerate(EachRow(combos))
         verbose ? println("Run $run/$samples") : nothing