diff --git a/polkadot/runtime/parachains/src/inclusion/mod.rs b/polkadot/runtime/parachains/src/inclusion/mod.rs
index 001394d1c9588..6bca327984d80 100644
--- a/polkadot/runtime/parachains/src/inclusion/mod.rs
+++ b/polkadot/runtime/parachains/src/inclusion/mod.rs
@@ -615,8 +615,12 @@ impl<T: Config> Pallet<T> {
 				}
 			});
 		}
-
-		(weight, freed_cores)
+		// For relay chain blocks, we're (ab)using the proof size
+		// to limit the raw transaction size of `ParaInherent` and
+		// there's no state proof (aka PoV) associated with it.
+		// Since we already accounted for bitfields size, we should
+		// not include `enact_candidate` PoV impact here.
+		(weight.set_proof_size(0), freed_cores)
 	}
 
 	/// Process candidates that have been backed. Provide a set of