diff --git a/manager.cpp b/manager.cpp
index 6ed908a..3a1fe40 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -461,11 +461,11 @@ bool RepostManager::drop_posts_older_than(std::vector<AbstractPost> &posts, long
   }
 }
 
-std::optional<AbstractPost> to_abstract_post(const vk::Post &post, int sourceIndex) {
+std::optional<AbstractPost> RepostManager::to_abstract_post(const vk::Post &post, int sourceIndex) {
   return { AbstractPost(posts::SRC_VK, sourceIndex, post.id, post.date, post.text) };
 }
 
-std::optional<AbstractPost> to_abstract_post(const td_api::message &post, int sourceIndex) {
+std::optional<AbstractPost> RepostManager::to_abstract_post(const td_api::message &post, int sourceIndex) {
   if (post.content_->get_id() == td_api::messageText::ID) {
     auto &content = (td_api::messageText&) *post.content_;
     return { AbstractPost(posts::SRC_TELEGRAM, sourceIndex, post.id_, post.date_, content.text_->text_) };