diff --git a/imports/api/genes/hectar/addHectar.js b/imports/api/genes/hectar/addHectar.js
index eaa7bd4e..8f961a79 100644
--- a/imports/api/genes/hectar/addHectar.js
+++ b/imports/api/genes/hectar/addHectar.js
@@ -57,10 +57,10 @@ class HectarProcessor {
       // Filters undefined data (with a dash) and splits into an array for
       // comma-separated data.
       for (const [key, value] of Object.entries(annotations)) {
-        if (value[0] === '-') {
+        if (value === undefined || value[0] === '-') {
           annotations[key] = undefined;
         }
-        if (value.indexOf(',') > -1) {
+        if (value !== undefined && value.indexOf(',') > -1) {
           annotations[key] = value.split(',');
         }
       }