diff --git a/src/app/annotation-table-term-filter/annotation-table-term-filter.component.ts b/src/app/annotation-table-term-filter/annotation-table-term-filter.component.ts
index 645d7b2d..f5f9ec6a 100644
--- a/src/app/annotation-table-term-filter/annotation-table-term-filter.component.ts
+++ b/src/app/annotation-table-term-filter/annotation-table-term-filter.component.ts
@@ -58,6 +58,7 @@ export class AnnotationTableTermFilterComponent implements OnInit, OnChanges {
     let seenAncestors: { [key: string]: boolean } = {};
 
     for (let termAnnotation of this.annotationTable) {
+      seenAncestors[termAnnotation.term.termid] = true;
       if (termAnnotation.term.interesting_parent_ids) {
         for (let ancestor of termAnnotation.term.interesting_parent_ids) {
           seenAncestors[ancestor] = true;