diff --git a/typescript/base/pane.ts b/typescript/base/pane.ts
index 1d8acd8bf..75c3fc9f0 100644
--- a/typescript/base/pane.ts
+++ b/typescript/base/pane.ts
@@ -8,5 +8,5 @@ export interface _Pane extends _Widget {
 }
 
 export interface _PaneStatic {
-    EVENT_LOADED: "EVENT_LOADED";
-}
\ No newline at end of file
+    EVENT_LOADED: string;
+}
diff --git a/typescript/base/single/button/button.basic.ts b/typescript/base/single/button/button.basic.ts
index 4aada2a99..acdb143d2 100644
--- a/typescript/base/single/button/button.basic.ts
+++ b/typescript/base/single/button/button.basic.ts
@@ -33,5 +33,5 @@ export interface _BasicButton extends _Single {
 }
 
 export interface _BasicButtonStatic {
-    EVENT_CHANGE: "BasicButton.EVENT_CHANGE";
+    EVENT_CHANGE: string;
 }