diff --git a/crates/node/builder/src/builder/mod.rs b/crates/node/builder/src/builder/mod.rs
index 15bdc730a8..9f7254bad7 100644
--- a/crates/node/builder/src/builder/mod.rs
+++ b/crates/node/builder/src/builder/mod.rs
@@ -177,6 +177,11 @@ impl<DB, ChainSpec> NodeBuilder<DB, ChainSpec> {
     pub const fn config(&self) -> &NodeConfig<ChainSpec> {
         &self.config
     }
+
+    /// Returns a mutable reference to the node builder's config.
+    pub fn config_mut(&mut self) -> &mut NodeConfig<ChainSpec> {
+        &mut self.config
+    }
 }
 
 impl<DB, ChainSpec: EthChainSpec> NodeBuilder<DB, ChainSpec> {