diff --git a/lightningd/lightningd.c b/lightningd/lightningd.c
index fd8cf3ec8..7208a5c99 100644
--- a/lightningd/lightningd.c
+++ b/lightningd/lightningd.c
@@ -217,10 +217,9 @@ static void shutdown_subdaemons(struct lightningd *ld)
 	db_commit_transaction(ld->wallet->db);
 }
 
-struct chainparams *get_chainparams(const struct lightningd *ld)
+const struct chainparams *get_chainparams(const struct lightningd *ld)
 {
-	return cast_const(struct chainparams *,
-			  ld->topology->bitcoind->chainparams);
+	return ld->topology->bitcoind->chainparams;
 }
 
 static void init_txfilter(struct wallet *w, struct txfilter *filter)
diff --git a/lightningd/lightningd.h b/lightningd/lightningd.h
index f738920b0..8ac352514 100644
--- a/lightningd/lightningd.h
+++ b/lightningd/lightningd.h
@@ -169,7 +169,7 @@ struct lightningd {
 #endif /* DEVELOPER */
 };
 
-struct chainparams *get_chainparams(const struct lightningd *ld);
+const struct chainparams *get_chainparams(const struct lightningd *ld);
 
 /* State for performing backtraces. */
 struct backtrace_state *backtrace_state;