diff --git a/lemur/static/app/angular/authorities/services.js b/lemur/static/app/angular/authorities/services.js
index 4763a0c3..0566454d 100644
--- a/lemur/static/app/angular/authorities/services.js
+++ b/lemur/static/app/angular/authorities/services.js
@@ -34,7 +34,7 @@ angular.module('lemur')
           }
 
           if (this.extensions.custom === undefined) {
-            this.extensions = {'custom': []};
+            this.extensions.custom = [];
           }
 
           if (angular.isString(this.customOid) && angular.isString(this.customEncoding) && angular.isString(this.customValue)) {
diff --git a/lemur/static/app/angular/certificates/services.js b/lemur/static/app/angular/certificates/services.js
index 317ae379..d9f02846 100644
--- a/lemur/static/app/angular/certificates/services.js
+++ b/lemur/static/app/angular/certificates/services.js
@@ -39,7 +39,7 @@ angular.module('lemur')
           }
 
           if (this.extensions.custom === undefined) {
-            this.extensions = {'custom': []};
+            this.extensions.custom = [];
           }
 
           if (angular.isString(this.customOid) && angular.isString(this.customEncoding) && angular.isString(this.customValue)) {