Further work. Compiles. WIP
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index b3a74c7..6546499 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -36,6 +36,7 @@
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc++/completion_queue.h>
 #include <grpc++/impl/call.h>
 #include <grpc++/impl/sync.h>
 #include <grpc++/support/time.h>