diff --git a/scripts/plot_gas_network.py b/scripts/plot_gas_network.py
index cd515e96..e2953604 100644
--- a/scripts/plot_gas_network.py
+++ b/scripts/plot_gas_network.py
@@ -97,7 +97,7 @@ def plot_ch4_map(n):
     link_widths_orig = n.links.p_nom / linewidth_factor
     link_widths_orig[n.links.p_nom < line_lower_threshold] = 0.0
 
-    max_usage = n.links_t.p0.abs().max(axis=0)
+    max_usage = n.links_t.p0[n.links.index].abs().max(axis=0)
     link_widths_used = max_usage / linewidth_factor
     link_widths_used[max_usage < line_lower_threshold] = 0.0