diff --git a/depmap_analysis/network_functions/net_functions.py b/depmap_analysis/network_functions/net_functions.py
index bd9f15e3..796c0f66 100644
--- a/depmap_analysis/network_functions/net_functions.py
+++ b/depmap_analysis/network_functions/net_functions.py
@@ -393,8 +393,11 @@ def add_corr_to_edges(graph: DiGraph, z_corr: pd.DataFrame,
     for u, v, data in tqdm(graph.edges(data=True)):
         un = u[0] if isinstance(u, tuple) else u
         vn = v[0] if isinstance(v, tuple) else v
-        z_sc = z_corr.loc[un, vn]
-        if un in z_corr and vn in z_corr and not np.isnan(z_sc) and not np.isinf(z_sc):
+        if (
+                un in z_corr and vn in z_corr and
+                not np.isnan(z_corr.loc[un, vn]) and
+                not np.isinf(z_corr.loc[un, vn])
+        ):
             z_sc = z_corr.loc[un, vn]
             data['z_score'] = round(z_sc, 4)
             data['corr_weight'] = round(z_sc_weight(z_sc, self_corr), 4)