diff --git a/chain/types/event.go b/chain/types/event.go
new file mode 100644
index 000000000..dc681d935
--- /dev/null
+++ b/chain/types/event.go
@@ -0,0 +1,24 @@
+package types
+
+import (
+	"github.com/filecoin-project/go-address"
+)
+
+type Event struct {
+	// The ID of the actor that emitted this event.
+	Emitter address.Address
+
+	// Key values making up this event.
+	Entries []EventEntry
+}
+
+type EventEntry struct {
+	// A bitmap conveying metadata or hints about this entry.
+	Flags uint8
+
+	// The key of this event entry
+	Key []byte
+
+	// Any DAG-CBOR encodeable type.
+	Value []byte
+}
diff --git a/chain/types/message_receipt.go b/chain/types/message_receipt.go
index 57761680d..990858d5f 100644
--- a/chain/types/message_receipt.go
+++ b/chain/types/message_receipt.go
@@ -3,15 +3,18 @@ package types
 import (
 	"bytes"
 
+	"github.com/ipfs/go-cid"
+
 	"github.com/filecoin-project/go-state-types/exitcode"
 )
 
 type MessageReceipt struct {
-	ExitCode exitcode.ExitCode
-	Return   []byte
-	GasUsed  int64
+	ExitCode   exitcode.ExitCode
+	Return     []byte
+	GasUsed    int64
+	EventsRoot cid.Cid // Root of Event AMT
 }
 
 func (mr *MessageReceipt) Equals(o *MessageReceipt) bool {
-	return mr.ExitCode == o.ExitCode && bytes.Equal(mr.Return, o.Return) && mr.GasUsed == o.GasUsed
+	return mr.ExitCode == o.ExitCode && bytes.Equal(mr.Return, o.Return) && mr.GasUsed == o.GasUsed && mr.EventsRoot == o.EventsRoot
 }
diff --git a/gen/main.go b/gen/main.go
index 95b2d43e3..125db293e 100644
--- a/gen/main.go
+++ b/gen/main.go
@@ -34,6 +34,8 @@ func main() {
 		types.BeaconEntry{},
 		types.StateRoot{},
 		types.StateInfo0{},
+		types.Event{},
+		types.EventEntry{},
 	)
 	if err != nil {
 		fmt.Println(err)