diff --git a/utils/utils.py b/utils/utils.py
index 502688b4..c93cecdf 100755
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -864,7 +864,7 @@ def apply_classifier(x, model, img, im0):
 def fitness(x):
     # Returns fitness (for use with results.txt or evolve.txt)
     w = [0.1, 0.1, 0.6, 0.2]  # weights for [P, R, mAP, F1]@0.5 or [P, R, mAP@0.5:0.95, mAP@0.5]
-    return (x[:, :4] * np.array([w])).sum(1)
+    return (x[:, :4] * w).sum(1)
 
 
 # Plotting functions ---------------------------------------------------------------------------------------------------