diff --git a/core/src/components/action-sheet/action-sheet-interface.ts b/core/src/components/action-sheet/action-sheet-interface.ts
index aa02db7ff4..d7d8154b8b 100644
--- a/core/src/components/action-sheet/action-sheet-interface.ts
+++ b/core/src/components/action-sheet/action-sheet-interface.ts
@@ -21,5 +21,5 @@ export interface ActionSheetButton {
   role?: 'cancel' | 'destructive' | 'selected' | string;
   icon?: string;
   cssClass?: string | string[];
-  handler?: () => boolean | void | Promise<boolean>;
+  handler?: () => boolean | void | Promise<boolean | void>;
 }
diff --git a/core/src/components/toast/toast-interface.ts b/core/src/components/toast/toast-interface.ts
index 0d8f1a828a..eba59f156b 100644
--- a/core/src/components/toast/toast-interface.ts
+++ b/core/src/components/toast/toast-interface.ts
@@ -26,5 +26,5 @@ export interface ToastButton {
   side?: 'start' | 'end';
   role?: 'cancel' | string;
   cssClass?: string | string[];
-  handler?: () => boolean | void | Promise<boolean>;
+  handler?: () => boolean | void | Promise<boolean | void>;
 }