diff --git a/faiss/IndexReplicas.cpp b/faiss/IndexReplicas.cpp
index 8295f34a60..85f3fda746 100644
--- a/faiss/IndexReplicas.cpp
+++ b/faiss/IndexReplicas.cpp
@@ -201,7 +201,7 @@ void IndexReplicasTemplate<IndexT>::syncWithSubIndexes() {
 }
 
 // explicit instantiations
-template struct IndexReplicasTemplate<Index>;
-template struct IndexReplicasTemplate<IndexBinary>;
+template class IndexReplicasTemplate<Index>;
+template class IndexReplicasTemplate<IndexBinary>;
 
 } // namespace faiss