diff --git a/benchmarks/tracking/scripts/tracking_performance.py b/benchmarks/tracking/scripts/tracking_performance.py
index c39c97171e57ba22f4b32a81ee1a4095c987e0c3..7a2cb76af88623aa5e8b588c3cf8ae1ca53ed6e8 100644
--- a/benchmarks/tracking/scripts/tracking_performance.py
+++ b/benchmarks/tracking/scripts/tracking_performance.py
@@ -166,7 +166,7 @@ if __name__ == '__main__':
     track_eff_upper = np.minimum(np.ones(shape=rec_eta.shape), track_eff + track_err) - track_eff
 
 
-    ax.errorbar(eta_centers, track_eff, xerr=eta_binsize/2., yerr=[track_eff_lower, track_eff_upper],
+    ax.errorbar(eta_centers, track_eff, xerr=eta_binsize/2., yerr=[np.abs(track_eff_lower), np.abs(track_eff_upper)],
                 fmt='o', capsize=3)
     ax.set_ylim(0., 1.1)
     ax.set_xlim(-4.5, 4.5)