diff --git a/TunnelGateway.cpp b/TunnelGateway.cpp
index cc1189e0..c85e92e6 100644
--- a/TunnelGateway.cpp
+++ b/TunnelGateway.cpp
@@ -107,7 +107,7 @@ namespace tunnel
 		}			
 	}
 	
-	std::vector<I2NPMessage *> TunnelGatewayBuffer::GetTunnelDataMsgs ()
+	const std::vector<I2NPMessage *> TunnelGatewayBuffer::GetTunnelDataMsgs ()
 	{
 		CompleteCurrentTunnelDataMessage ();
 		std::vector<I2NPMessage *> ret = m_TunnelDataMsgs; // TODO: implement it better
diff --git a/TunnelGateway.h b/TunnelGateway.h
index 8c390eef..aec0ca03 100644
--- a/TunnelGateway.h
+++ b/TunnelGateway.h
@@ -16,7 +16,7 @@ namespace tunnel
 			TunnelGatewayBuffer (uint32_t tunnelID): m_TunnelID (tunnelID), 
 				m_CurrentTunnelDataMsg (nullptr), m_RemainingSize (0) {};
 			void PutI2NPMsg (const TunnelMessageBlock& block);	
-			std::vector<I2NPMessage *> GetTunnelDataMsgs ();
+			const std::vector<I2NPMessage *> GetTunnelDataMsgs ();
 
 		private: