diff --git a/client/src/components/Collections/PairedListCollectionCreator.vue b/client/src/components/Collections/PairedListCollectionCreator.vue
index 8fee2dc0f3d..32d21b05b30 100644
--- a/client/src/components/Collections/PairedListCollectionCreator.vue
+++ b/client/src/components/Collections/PairedListCollectionCreator.vue
@@ -724,7 +724,7 @@ export default {
                     revName = revName.replace(extension, "");
                 }
             }
-            if (lcs.substring(lcs.length - 1) == "." || lcs.substring(lcs.length - 1) == "_") {
+            if (lcs.endsWith(".") || lcs.endsWith("_")) {
                 lcs = lcs.substring(0, lcs.length - 1);
             }
             return lcs || `${fwdName} & ${revName}`;