diff --git a/nodes/spatial/voronoi_on_solid.py b/nodes/spatial/voronoi_on_solid.py
index 7f4e77d4fd..7fbd1c2043 100644
--- a/nodes/spatial/voronoi_on_solid.py
+++ b/nodes/spatial/voronoi_on_solid.py
@@ -164,7 +164,7 @@ def process(self):
                     src = solid
 
                 if need_inner:
-                    inner = [src.common(fragment) for fragment in fragments]
+                    inner = [src.common(fragments)]
                     if self.flat_output:
                         new_inner_fragments.extend(inner)
                     else: