diff --git a/packages/react-reconciler/src/ReactFiberHooks.js b/packages/react-reconciler/src/ReactFiberHooks.js
index 1b51f2cc395b7..eb8088cc6743e 100644
--- a/packages/react-reconciler/src/ReactFiberHooks.js
+++ b/packages/react-reconciler/src/ReactFiberHooks.js
@@ -1784,7 +1784,7 @@ if (__DEV__) {
     ): Snapshot {
       currentHookNameInDev = 'useMutableSource';
       mountHookTypesDev();
-      return mountMutableSource<Source, Snapshot>(source, config);
+      return mountMutableSource(source, config);
     },
   };
 
@@ -2299,7 +2299,7 @@ if (__DEV__) {
       currentHookNameInDev = 'useMutableSource';
       warnInvalidHookAccess();
       mountHookTypesDev();
-      return mountMutableSource<Source, Snapshot>(source, config);
+      return mountMutableSource(source, config);
     },
   };