diff --git a/bug/operation.go b/bug/operation.go
index b36103815233777373ccc7454a0d3c62a2bc188b..2e86921a63db6fc27e53414df33ca6ca717296cd 100644
--- a/bug/operation.go
+++ b/bug/operation.go
@@ -71,7 +71,7 @@ func idOperation(op Operation, base *OpBase) entity.Id {
 	return base.id
 }
 
-func operationUnmarshaller(author identity.Interface, raw json.RawMessage) (dag.Operation, error) {
+func operationUnmarshaller(author identity.Interface, raw json.RawMessage, resolver identity.Resolver) (dag.Operation, error) {
 	var t struct {
 		OperationType OperationType `json:"type"`
 	}
diff --git a/entity/dag/common_test.go b/entity/dag/common_test.go
index 25289b764b38943b55e3efe2d89c489ba3247a35..532e3ff8fe1a6c88f7d851a2d83ed7dce6dfb034 100644
--- a/entity/dag/common_test.go
+++ b/entity/dag/common_test.go
@@ -67,7 +67,7 @@ func (o *op2) Author() identity.Interface {
 	return o.author
 }
 
-func unmarshaler(author identity.Interface, raw json.RawMessage) (Operation, error) {
+func unmarshaler(author identity.Interface, raw json.RawMessage, resolver identity.Resolver) (Operation, error) {
 	var t struct {
 		OperationType int `json:"type"`
 	}
diff --git a/entity/dag/entity.go b/entity/dag/entity.go
index ffdbe33528fd29a673c02c0fa4c393060ccdddb3..0760cdec8064b9cdf4986efbaf0dbdf2142ad03c 100644
--- a/entity/dag/entity.go
+++ b/entity/dag/entity.go
@@ -26,7 +26,7 @@ type Definition struct {
 	// the Namespace in git references (bugs, prs, ...)
 	Namespace string
 	// a function decoding a JSON message into an Operation
-	OperationUnmarshaler func(author identity.Interface, raw json.RawMessage) (Operation, error)
+	OperationUnmarshaler func(author identity.Interface, raw json.RawMessage, resolver identity.Resolver) (Operation, error)
 	// the expected format version number, that can be used for data migration/upgrade
 	FormatVersion uint
 }
diff --git a/entity/dag/operation_pack.go b/entity/dag/operation_pack.go
index d825281bfc19f00da8b98cd66f626c34179deb96..8ca2ff56ebceb8103bfec276e75b85dd868b5a14 100644
--- a/entity/dag/operation_pack.go
+++ b/entity/dag/operation_pack.go
@@ -314,7 +314,7 @@ func unmarshallPack(def Definition, resolver identity.Resolver, data []byte) ([]
 
 	for _, raw := range aux.Operations {
 		// delegate to specialized unmarshal function
-		op, err := def.OperationUnmarshaler(author, raw)
+		op, err := def.OperationUnmarshaler(author, raw, resolver)
 		if err != nil {
 			return nil, nil, err
 		}