diff --git a/src/resolvers/Mutation.js b/src/resolvers/Mutation.js
index ad52b84..05184b3 100644
--- a/src/resolvers/Mutation.js
+++ b/src/resolvers/Mutation.js
@@ -44,11 +44,11 @@ async function login(parent, args, context, info) {
 
 async function vote(parent, args, context, info) {
   const userId = getUserId(context)
-  const linkExists = await context.prisma.$exists.vote({
+  const voteExists = await context.prisma.$exists.vote({
     user: { id: userId },
     link: { id: args.linkId },
   })
-  if (linkExists) {
+  if (voteExists) {
     throw new Error(`Already voted for link: ${args.linkId}`)
   }