diff --git a/packages/theme/src/compat/index.ts b/packages/theme/src/compat/index.ts
new file mode 100644
index 0000000000..fe6863b8bc
--- /dev/null
+++ b/packages/theme/src/compat/index.ts
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export { MultiThemeProvider } from './MultiThemeProvider';
+export type { MultiThemeHolder } from './types';
diff --git a/packages/theme/src/index.ts b/packages/theme/src/index.ts
index c9f0ebd289..a6c9632983 100644
--- a/packages/theme/src/index.ts
+++ b/packages/theme/src/index.ts
@@ -20,6 +20,7 @@
  * @packageDocumentation
  */
 
+export * from './compat';
 export * from './v4';
 export * from './v5';
 export { colorVariants, genPageTheme, pageTheme, shapes } from './pageTheme';