diff --git a/src/Network.tsx b/src/Network.tsx
index 0f7fa5d..ef33c3b 100644
--- a/src/Network.tsx
+++ b/src/Network.tsx
@@ -76,7 +76,7 @@ export const GraphComponent = () => {
     const matches = findMatches(data.edges);
     const newEdges = data.edges;
     if (mutuality) {
-      newEdges.forEach((edge) => { if ((likes === 1 || edge.data.relation === likes) && matches.map((edge) => edge.id).includes(edge.id)) { edge.fill = "#9c3"; edge.size = edge.size * 1.5 } })
+      newEdges.forEach((edge) => { if ((likes === 1 || edge.data.relation === likes) && matches.map((edge) => edge.id).includes(edge.id)) { edge.fill = "#9c3"; if (edge.size) edge.size = edge.size * 1.5 } })
     } else {
       newEdges.forEach((edge) => { if ((likes === 1 || edge.data.relation === likes) && matches.map((edge) => edge.id).includes(edge.id)) { edge.fill = edge.data.origFill; edge.size = edge.data.origSize } })
     }