diff --git a/packages/app/src/styles/types.ts b/packages/app/src/styles/types.ts
index e5a2c3ecd5..155842eebc 100644
--- a/packages/app/src/styles/types.ts
+++ b/packages/app/src/styles/types.ts
@@ -121,9 +121,3 @@ export interface AffineThemeCSSVariables {
 declare module '@emotion/react' {
   export interface Theme extends AffineTheme {}
 }
-
-declare global {
-  interface Window {
-    CLIENT_APP?: boolean;
-  }
-}
diff --git a/packages/app/src/types.ts b/packages/app/src/types.ts
new file mode 100644
index 0000000000..b3d1620796
--- /dev/null
+++ b/packages/app/src/types.ts
@@ -0,0 +1,7 @@
+declare global {
+  interface Window {
+    CLIENT_APP?: boolean;
+  }
+}
+
+export {};