diff --git a/grpc/CMakeLists.txt b/grpc/CMakeLists.txt
index f9365a4a..965f128f 100644
--- a/grpc/CMakeLists.txt
+++ b/grpc/CMakeLists.txt
@@ -32,7 +32,6 @@ ADD_CUSTOM_COMMAND(
         COMMAND ${_PROTOBUF_PROTOC}
         ARGS --grpc_python_out "${CMAKE_SOURCE_DIR}/python"
         --python_out "${CMAKE_SOURCE_DIR}/python"
-        --pyi_out "${CMAKE_SOURCE_DIR}/python"
         -I "${CMAKE_CURRENT_SOURCE_DIR}"
         --plugin=protoc-gen-grpc_python="${_GRPC_PYTHON_PLUGIN_EXECUTABLE}"
         "${rg_proto}"