diff --git a/givre/src/signing/aggregate.rs b/givre/src/signing/aggregate.rs
index f065008..8743a8e 100644
--- a/givre/src/signing/aggregate.rs
+++ b/givre/src/signing/aggregate.rs
@@ -130,10 +130,12 @@ pub fn aggregate<C: Ciphersuite>(
         .map(|(_j, _comm, sig_share)| sig_share.0)
         .sum();
 
-    Ok(Signature {
+    let sig = Signature {
         r: C::normalize_point(group_commitment),
         z,
-    })
+    };
+    sig.verify(&C::normalize_point(key_info.shared_public_key), msg)
+        .map_err(|_| Reason::InvalidSig)?;
 }
 
 /// Aggregation error