diff --git a/README.md b/README.md
index 553c314..beff1aa 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ This is a golang interface of [hnswlib](https://github.com/nmslib/hnswlib). For
 
 # Compile (Optional)
 ```bash
-git clone github.com/evan176/hnswgo
+git clone github.com/evan176/hnswgo.git
 cd hnswgo && make
 sudo cp libhnsw.so /usr/local/lib
 ldconfig
diff --git a/hnsw_wrapper.cc b/hnsw_wrapper.cc
index 4cdda44..1e7958c 100644
--- a/hnsw_wrapper.cc
+++ b/hnsw_wrapper.cc
@@ -29,6 +29,7 @@ HNSW loadHNSW(char *location, int dim, char stype) {
 
 HNSW saveHNSW(HNSW index, char *location) {
   ((hnswlib::HierarchicalNSW<float>*)index)->saveIndex(location);
+  return ((hnswlib::HierarchicalNSW<float>*)index);
 }
 
 void freeHNSW(HNSW index) {