diff --git a/experiments/grid_search.jl b/experiments/grid_search.jl
index 88aa93c9a6601de6a75484f7f1e74ecf4aaa2434..45c24e6a6f2d11e44acef9d04e495fff905bd909 100644
--- a/experiments/grid_search.jl
+++ b/experiments/grid_search.jl
@@ -161,7 +161,7 @@ function best_absolute_outcome(
     df_weights = DataFrame(variable = measure, weight = weights)
 
     avg_values = []
-    for (params, outcome) in (outcomes[:df_outcomes].params, outcomes[:df_outcomes].outcome)
+    for (params, outcome) in zip(outcomes[:df_outcomes].params, outcomes[:df_outcomes].outcome)
 
         # Setup
         evaluation = deepcopy(outcome.bmk.evaluation)