diff --git a/src/browser/CoreBrowserTerminal.ts b/src/browser/CoreBrowserTerminal.ts
index dca090f6..c26e6705 100644
--- a/src/browser/CoreBrowserTerminal.ts
+++ b/src/browser/CoreBrowserTerminal.ts
@@ -1113,8 +1113,8 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
 
     // HACK: Process A-Z in the keypress event to fix an issue with macOS IMEs where lower case
     // letters cannot be input while caps lock is on. Skip this hack when using kitty protocol
-    // as it needs to send proper CSI u sequences for all key events.
-    if (!this._keyboardService.useKitty && event.key && !event.ctrlKey && !event.altKey && !event.metaKey && event.key.length === 1) {
+    // or Win32 input mode as they need to send proper sequences for all key events.
+    if (!this._keyboardService.useKitty && !this._keyboardService.useWin32InputMode && event.key && !event.ctrlKey && !event.altKey && !event.metaKey && event.key.length === 1) {
       if (event.key.charCodeAt(0) >= 65 && event.key.charCodeAt(0) <= 90) {
         return true;
       }
diff --git a/src/browser/services/Services.ts b/src/browser/services/Services.ts
index cac62915..535afa64 100644
--- a/src/browser/services/Services.ts
+++ b/src/browser/services/Services.ts
@@ -163,4 +163,5 @@ export interface IKeyboardService {
   evaluateKeyDown(event: KeyboardEvent): IKeyboardResult;
   evaluateKeyUp(event: KeyboardEvent): IKeyboardResult | undefined;
   readonly useKitty: boolean;
+  readonly useWin32InputMode: boolean;
 }