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-rw-r--r--host/lib/rfnoc/addsub_block_control.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/host/lib/rfnoc/addsub_block_control.cpp b/host/lib/rfnoc/addsub_block_control.cpp
index 516b348b1..f91703193 100644
--- a/host/lib/rfnoc/addsub_block_control.cpp
+++ b/host/lib/rfnoc/addsub_block_control.cpp
@@ -37,6 +37,9 @@ public:
// opposite side from which they are received.
set_prop_forwarding_policy(forwarding_policy_t::ONE_TO_FAN);
set_action_forwarding_policy(forwarding_policy_t::ONE_TO_FAN);
+ // MTU is also fanned out the same way as we produce output packets the
+ // same size as input packets.
+ set_mtu_forwarding_policy(forwarding_policy_t::ONE_TO_FAN);
// Register the block's edge type properties.
register_property(&_prop_type_in_a);