diff --git a/server/modules/routing/readwritesplit/readwritesplit.cc b/server/modules/routing/readwritesplit/readwritesplit.cc
index ba1292d7e..9163dc092 100644
--- a/server/modules/routing/readwritesplit/readwritesplit.cc
+++ b/server/modules/routing/readwritesplit/readwritesplit.cc
@@ -690,7 +690,7 @@ SERVICE* RWSplit::service() const
     return m_service;
 }
 
-Config& RWSplit::config()
+const Config& RWSplit::config() const
 {
     return m_config;
 }
diff --git a/server/modules/routing/readwritesplit/readwritesplit.hh b/server/modules/routing/readwritesplit/readwritesplit.hh
index 3e45a2f37..4a2b2d738 100644
--- a/server/modules/routing/readwritesplit/readwritesplit.hh
+++ b/server/modules/routing/readwritesplit/readwritesplit.hh
@@ -224,7 +224,7 @@ public:
     ~RWSplit();
 
     SERVICE* service() const;
-    Config&  config();
+    const Config&  config() const;
     Stats&   stats();
 
 private: