diff --git a/x-pack/plugins/maps/public/classes/tooltips/es_tooltip_property.ts b/x-pack/plugins/maps/public/classes/tooltips/es_tooltip_property.ts
index c0d7d604d1d8e..1b677b196c997 100644
--- a/x-pack/plugins/maps/public/classes/tooltips/es_tooltip_property.ts
+++ b/x-pack/plugins/maps/public/classes/tooltips/es_tooltip_property.ts
@@ -104,7 +104,7 @@ export class ESTooltipProperty implements ITooltipProperty {
     } else {
       const values = Array.isArray(rawValue) ? (rawValue as string[]) : [rawValue as string];
       return values.map((value) => {
-        return esFilters.buildPhraseFilter(indexPatternField, value as string, this._indexPattern);
+        return esFilters.buildPhraseFilter(indexPatternField, value, this._indexPattern);
       });
     }
   }