diff --git a/x-pack/plugins/fleet/server/saved_objects/index.ts b/x-pack/plugins/fleet/server/saved_objects/index.ts
index 180adcfd50467..a1d6e61c0fa66 100644
--- a/x-pack/plugins/fleet/server/saved_objects/index.ts
+++ b/x-pack/plugins/fleet/server/saved_objects/index.ts
@@ -357,7 +357,7 @@ const getSavedObjectTypes = (): { [key: string]: SavedObjectsType } => ({
           {
             type: 'mappings_addition',
             addedMappings: {
-              is_internal: { type: 'keyword', index: false },
+              is_internal: { type: 'boolean', index: false },
             },
           },
         ],