Fix sanity
diff --git a/src/cpp/common/version_cc.cc b/src/cpp/common/version_cc.cc
index 826ddfb..7be3384 100644
--- a/src/cpp/common/version_cc.cc
+++ b/src/cpp/common/version_cc.cc
@@ -37,5 +37,5 @@
 #include <grpc++/grpc++.h>
 
 namespace grpc {
-std::string Version() { return "1.1.0-dev"; }
+grpc::string Version() { return "1.1.0-dev"; }
 }