diff --git a/client-app/src/preload/index.ts b/client-app/src/preload/index.ts
index 31202e1006..8c0adf5c5c 100644
--- a/client-app/src/preload/index.ts
+++ b/client-app/src/preload/index.ts
@@ -16,3 +16,12 @@ function setEnvironmentVariables() {
 }
 
 setEnvironmentVariables();
+
+declare global {
+  interface Window {
+    CLIENT_APP?: boolean;
+    __editoVersion?: string;
+  }
+}
+
+export {};