diff --git a/actors/market/src/lib.rs b/actors/market/src/lib.rs
index c1cc47960..2c3b73f74 100644
--- a/actors/market/src/lib.rs
+++ b/actors/market/src/lib.rs
@@ -745,6 +745,13 @@ impl Actor {
                     // No continue below here, to ensure state changes are consistent.
                     activated_deals.insert(deal_id);
 
+                    emit::deal_activated(
+                        rt,
+                        deal_id,
+                        proposal.client.id().unwrap(),
+                        proposal.provider.id().unwrap(),
+                    )?;
+
                     // Remove any verified allocation ID for the pending deal.
                     pending_deal_allocation_ids.delete(&deal_id)?;
 
diff --git a/actors/market/tests/sector_content_changed.rs b/actors/market/tests/sector_content_changed.rs
index 2366ba485..59439d38b 100644
--- a/actors/market/tests/sector_content_changed.rs
+++ b/actors/market/tests/sector_content_changed.rs
@@ -73,6 +73,15 @@ fn simple_one_sector() {
         minimum_commitment_epoch: END_EPOCH + 10,
         added: pieces,
     }];
+    for deal_id in deal_ids.iter().rev() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     let ret = sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
     assert_eq!(1, ret.sectors.len());
     assert_eq!(3, ret.sectors[0].added.len());
@@ -117,6 +126,15 @@ fn simple_multiple_sectors() {
             added: pieces[2..3].to_vec(),
         },
     ];
+    for deal_id in deal_ids.iter() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     let ret = sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
     assert_eq!(3, ret.sectors.len());
     assert_eq!(vec![PieceReturn { accepted: true }], ret.sectors[0].added);
@@ -142,6 +160,15 @@ fn new_deal_existing_sector() {
         minimum_commitment_epoch: END_EPOCH + 10,
         added: pieces[1..3].to_vec(),
     }];
+    for deal_id in deal_ids[1..3].iter() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
 
     let changes = vec![SectorChanges {
@@ -149,6 +176,15 @@ fn new_deal_existing_sector() {
         minimum_commitment_epoch: END_EPOCH + 10,
         added: pieces[0..1].to_vec(),
     }];
+    for deal_id in deal_ids[0..1].iter() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
 
     // All deal IDs are stored under the right sector, in correct order.
@@ -244,6 +280,16 @@ fn failures_isolated() {
         },
     ];
 
+    // only first and last pieces emit an event
+    for deal_id in [deal_ids.first().unwrap(), deal_ids.last().unwrap()] {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     let ret = sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
     assert_eq!(3, ret.sectors.len());
     // Broken second piece still allows first piece in same sector to activate.
@@ -278,6 +324,15 @@ fn rejects_duplicates_in_same_sector() {
             added: vec![pieces[0].clone(), pieces[0].clone(), pieces[1].clone()],
         },
     ];
+    for deal_id in deal_ids.iter() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     let ret = sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
     assert_eq!(1, ret.sectors.len());
     // The first piece succeeds just once, the second piece succeeds too.
@@ -323,6 +378,15 @@ fn rejects_duplicates_across_sectors() {
             added: vec![pieces[0].clone(), pieces[1].clone(), pieces[2].clone()],
         },
     ];
+    for deal_id in deal_ids.iter() {
+        harness::expect_emitted(
+            &rt,
+            "deal-activated",
+            *deal_id,
+            CLIENT_ADDR.id().unwrap(),
+            MINER_ADDRESSES.provider.id().unwrap(),
+        );
+    }
     let ret = sector_content_changed(&rt, PROVIDER_ADDR, changes).unwrap();
     assert_eq!(3, ret.sectors.len());
     // Succeeds in the first time.
diff --git a/integration_tests/src/tests/prove_commit3_test.rs b/integration_tests/src/tests/prove_commit3_test.rs
index 17e5c4d47..ab94e0b89 100644
--- a/integration_tests/src/tests/prove_commit3_test.rs
+++ b/integration_tests/src/tests/prove_commit3_test.rs
@@ -323,6 +323,13 @@ pub fn prove_commit_sectors2_test(v: &dyn VM) {
                 ),
                 value: Some(TokenAmount::zero()),
                 subinvocs: Some(vec![]),
+                events: deal_ids_s3
+                    .iter()
+                    .chain(deal_ids_s4.iter())
+                    .map(|deal_id| {
+                        Expect::build_market_event("deal-activated", *deal_id, client_id, miner_id)
+                    })
+                    .collect::<Vec<_>>(),
                 ..Default::default()
             },
         ]),
diff --git a/integration_tests/src/tests/replica_update3_test.rs b/integration_tests/src/tests/replica_update3_test.rs
index 321512bc6..de31f6e2a 100644
--- a/integration_tests/src/tests/replica_update3_test.rs
+++ b/integration_tests/src/tests/replica_update3_test.rs
@@ -387,6 +387,14 @@ pub fn prove_replica_update2_test(v: &dyn VM) {
                 ),
                 value: Some(TokenAmount::zero()),
                 subinvocs: Some(vec![]),
+                events: deal_ids_s3
+                    .iter()
+                    .chain(deal_ids_s4.iter())
+                    .map(|deal_id| {
+                        Expect::build_market_event("deal-activated", *deal_id, client_id, miner_id)
+                    })
+                    .collect::<Vec<_>>(),
+
                 ..Default::default()
             },
         ]),