diff --git a/cpp/README.md b/cpp/README.md
index c1cd381442c25cb9296f2ebbc606b16507503f72..1b2f507db253250d52c2d892a7038a752c5615ec 100644
--- a/cpp/README.md
+++ b/cpp/README.md
@@ -53,6 +53,12 @@ If you encounter the following error when building:
 ### Launch server
 Set config in cpp/conf/server_config.yaml
 
+Add milvus/bin/lib to LD_LIBRARY_PATH
+
+```
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/milvus/bin/lib
+```
+
 Then launch server with config:
     cd [build output path]
     start_server.sh