diff --git a/client/src/graphql/client.js b/client/src/graphql/client.js
index 7280a0e7..664216d5 100644
--- a/client/src/graphql/client.js
+++ b/client/src/graphql/client.js
@@ -53,6 +53,7 @@ export default function (uri) {
         // todo: remove, the new client seems to cache this correctly by itself
         // module: (_, args, {getCacheKey}) => getCacheKey({__typename: 'ModuleNode', id: args.id}),
         projectEntry: (_, args, {getCacheKey}) => getCacheKey({__typename: 'ProjectEntryNode', id: args.id}),
+        instrument: (_, args, {getCacheKey}) => getCacheKey({__typename: 'InstrumentNode', id: args.id}),
       }
     }
   });