diff --git a/scripts/addons_core/node_wrangler/operators.py b/scripts/addons_core/node_wrangler/operators.py
index 5208c0512f4..7b7e0e5bc69 100644
--- a/scripts/addons_core/node_wrangler/operators.py
+++ b/scripts/addons_core/node_wrangler/operators.py
@@ -769,7 +769,7 @@ class NWMergeNodes(Operator, NWBase):
                     and nodes_list in (selected_math, selected_vector, selected_mix)
                     and mode == 'MIX'):
                 mode = 'ADD'
-            if merge_position == 'CENTER':
+            if merge_position == 'CENTER' and len(nodes_list) >= 2:
                 # average yloc of last two nodes (lowest two)
                 loc_y = ((nodes_list[-1][2]) + (nodes_list[-2][2])) / 2
                 if nodes_list[-1][-1]:  # if last node is hidden, mix should be shifted up a bit