diff --git a/gpx.h b/gpx.h
index b7e800f..fe12dca 100644
--- a/gpx.h
+++ b/gpx.h
@@ -20,5 +20,5 @@ public:
 	~GPX();
 
 	Cache get_cache(const std::string& code) const;
-	Caches get_user_caches(const std::string& uuid = "", int count = 0) const;
+	Caches get_user_caches(const std::string& uuid = "", int count = 0) const override;
 };
diff --git a/ocdb.h b/ocdb.h
index 7f32f62..0b5c958 100644
--- a/ocdb.h
+++ b/ocdb.h
@@ -35,5 +35,5 @@ public:
 	void set_revision(int rev);
 
 	Caches get_user_caches_not_found(const std::string& uuid) const;
-	Caches get_user_caches(const std::string& uuid, int count = 0) const;
+	Caches get_user_caches(const std::string& uuid, int count = 0) const override;
 };
diff --git a/okapi.h b/okapi.h
index 9ed9dac..cdf7119 100644
--- a/okapi.h
+++ b/okapi.h
@@ -24,7 +24,7 @@ public:
 
 	// 	Cache get_cache(std::string code);
 	Caches get_caches(const std::map<std::string, std::tm>& codes) const;
-	Caches get_user_caches(const std::string& uuid, int count = 0) const;
+	Caches get_user_caches(const std::string& uuid, int count = 0) const override;
 	std::string get_changelog_json(int revision) const;
 
 	std::string get_uuid(const std::string& username) const;