diff --git a/src/init.cpp b/src/init.cpp
index d8dc4e8bec..a3376767cf 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -804,6 +804,7 @@ static bool AppInitServers(NodeContext& node)
 void InitParameterInteraction(ArgsManager& args)
 {
     if (args.GetBoolArg("-corepolicy", DEFAULT_COREPOLICY)) {
+        args.SoftSetArg("-acceptnonstddatacarrier", "1");
         args.SoftSetArg("-bytespersigopstrict", "0");
         args.SoftSetArg("-permitbarepubkey", "1");
         args.SoftSetArg("-permitbaremultisig", "1");
diff --git a/src/kernel/mempool_options.h b/src/kernel/mempool_options.h
index 23313b224d..26bd29818a 100644
--- a/src/kernel/mempool_options.h
+++ b/src/kernel/mempool_options.h
@@ -33,7 +33,7 @@ static constexpr TRUCPolicy DEFAULT_MEMPOOL_TRUC_POLICY{TRUCPolicy::Enforce};
 /** Whether to fall back to legacy V1 serialization when writing mempool.dat */
 static constexpr bool DEFAULT_PERSIST_V1_DAT{false};
 /** Default for -acceptnonstddatacarrier */
-static constexpr bool DEFAULT_ACCEPT_NON_STD_DATACARRIER{true};
+static constexpr bool DEFAULT_ACCEPT_NON_STD_DATACARRIER{false};
 /** Default for -acceptnonstdtxn */
 static constexpr bool DEFAULT_ACCEPT_NON_STD_TXN{false};