diff --git a/iproute2/base.go b/iproute2/base.go
index 4d9885f..5ee73ec 100644
--- a/iproute2/base.go
+++ b/iproute2/base.go
@@ -214,7 +214,7 @@ func unmarshalInterfacesData(data string) (Interfaces, error) {
 	var addresses Interfaces
 	err := json.Unmarshal([]byte(data), &addresses)
 	if err != nil {
-		return nil, err
+		return nil, &UnmarshalError{Msg: err.Error(), Content: data}
 	}
 
 	return addresses, nil
diff --git a/iproute2/error.go b/iproute2/error.go
index 87ea93e..2e89bb3 100644
--- a/iproute2/error.go
+++ b/iproute2/error.go
@@ -42,6 +42,15 @@ func (e *OperationNotPermittedError) Error() string {
 	return e.Msg
 }
 
+type UnmarshalError struct {
+	Msg     string
+	Content string
+}
+
+func (e *UnmarshalError) Error() string {
+	return fmt.Sprint(e.Msg, ": ", e.Content)
+}
+
 type UnknownError struct {
 	Msg string
 }