diff --git a/packages/mui-material/src/Popper/index.d.ts b/packages/mui-material/src/Popper/index.d.ts
index f36e7aeba93a2a..cab213fb513e8e 100644
--- a/packages/mui-material/src/Popper/index.d.ts
+++ b/packages/mui-material/src/Popper/index.d.ts
@@ -1,4 +1,5 @@
 export { default } from './Popper';
 export * from './Popper';
+export { default as popperClasses } from './popperClasses';
 export * from './popperClasses';
 export { PopperPlacementType } from './BasePopper.types';
diff --git a/packages/mui-material/src/Popper/index.js b/packages/mui-material/src/Popper/index.js
index 30316b8bf1c91b..29b91c5ee3b433 100644
--- a/packages/mui-material/src/Popper/index.js
+++ b/packages/mui-material/src/Popper/index.js
@@ -1,2 +1,3 @@
 export { default } from './Popper';
+export { default as popperClasses } from './popperClasses';
 export * from './popperClasses';