wip
diff --git a/test/cpp/interop/server_helper.h b/test/cpp/interop/server_helper.h
index d738d05..006a0e3 100644
--- a/test/cpp/interop/server_helper.h
+++ b/test/cpp/interop/server_helper.h
@@ -36,6 +36,7 @@
#include <memory>
+#include <grpc/compression.h>
#include <grpc++/server_context.h>
#include <grpc++/server_credentials.h>
@@ -49,6 +50,7 @@
InteropContextInspector(const ::grpc::ServerContext& context);
// Inspector methods, able to peek inside ServerContext go here.
+ grpc_compression_algorithm GetCallCompressionAlgorithm() const;
private:
const ::grpc::ServerContext& context_;