diff --git a/examples/BUILD b/examples/BUILD
index 6f801963c6eba5705f94cd6e27b8b8d9189b876b..1455d25dc765e8a4088a8feac67e8e705f923d09 100644
--- a/examples/BUILD
+++ b/examples/BUILD
@@ -67,7 +67,7 @@ proto_library(
 
 py_proto_library(
     name = "helloworld_py_pb2",
-    srcs = [":protos/helloworld_proto"],
+    deps = [":protos/helloworld_proto"],
 )
 
 py_grpc_library(