diff --git a/userspace/falco/grpc_context.cpp b/userspace/falco/grpc_context.cpp
index 4c6d5c4d..c5257049 100644
--- a/userspace/falco/grpc_context.cpp
+++ b/userspace/falco/grpc_context.cpp
@@ -29,16 +29,23 @@ context::context(grpc::ServerContext* ctx):
 	get_metadata(meta_session, session_id);
 	get_metadata(meta_session, request_id);
 
+	bool has_meta = false;
 	std::stringstream meta;
 	if(!session_id.empty())
 	{
 		meta << "[sid=" << session_id << "]";
+		has_meta = true;
 	}
-
 	if(!request_id.empty())
 	{
 		meta << "[rid=" << request_id << "]";
+		has_meta = true;
 	}
+	if(has_meta)
+	{
+		meta << " ";
+	}
+	m_prefix = meta.str();
 }
 
 void context::get_metadata(std::string key, std::string& val)
diff --git a/userspace/falco/grpc_context.h b/userspace/falco/grpc_context.h
index c8c73dbe..4781517a 100644
--- a/userspace/falco/grpc_context.h
+++ b/userspace/falco/grpc_context.h
@@ -18,6 +18,8 @@ limitations under the License.
 
 #pragma once
 
+#include <string>
+
 #ifdef GRPC_INCLUDE_IS_GRPCPP
 #include <grpcpp/grpcpp.h>
 #else
@@ -37,6 +39,7 @@ public:
 
 private:
 	grpc::ServerContext* m_ctx = nullptr;
+	std::string m_prefix;
 };
 
 class stream_context : public context