diff --git a/include/mumlib/Callback.hpp b/include/mumlib/Callback.hpp
index bc668d9..7ff4aa6 100644
--- a/include/mumlib/Callback.hpp
+++ b/include/mumlib/Callback.hpp
@@ -159,21 +159,21 @@ namespace mumlib {
                 uint8_t patch,
                 string release,
                 string os,
-                string os_version);
+                string os_version) override;
 
         virtual void audio(
                 int target,
                 int sessionId,
                 int sequenceNumber,
                 int16_t *pcm_data,
-                uint32_t pcm_data_size);
+                uint32_t pcm_data_size) override;
 
         virtual void unsupportedAudio(
                 int target,
                 int sessionId,
                 int sequenceNumber,
                 uint8_t *encoded_audio_data,
-                uint32_t encoded_audio_data_size);
+                uint32_t encoded_audio_data_size) override;
 
         virtual void serverSync(
                 string welcome_text,
@@ -181,7 +181,7 @@ namespace mumlib {
                 int32_t max_bandwidth,
                 int64_t permissions);
 
-        virtual void channelRemove(uint32_t channel_id);
+        virtual void channelRemove(uint32_t channel_id) override;
 
         virtual void channelState(
                 string name,
@@ -192,13 +192,13 @@ namespace mumlib {
                 vector<uint32_t> inks_add,
                 vector<uint32_t> links_remove,
                 bool temporary,
-                int32_t position);
+                int32_t position) override;
 
         virtual void userRemove(
                 uint32_t session,
                 int32_t actor,
                 string reason,
-                bool ban);
+                bool ban) override;
 
         virtual void userState(
                 int32_t session,
@@ -213,7 +213,7 @@ namespace mumlib {
                 int32_t self_deaf,
                 string comment,
                 int32_t priority_speaker,
-                int32_t recording);
+                int32_t recording) override;
 
         virtual void banList(
                 const uint8_t *ip_data,
@@ -223,14 +223,14 @@ namespace mumlib {
                 string hash,
                 string reason,
                 string start,
-                int32_t duration);
+                int32_t duration) override;
 
         virtual void textMessage(
                 uint32_t actor,
                 std::vector<uint32_t> session,
                 std::vector<uint32_t> channel_id,
                 std::vector<uint32_t> tree_id,
-                string message);
+                string message) override;
 
         virtual void permissionDenied(
                 int32_t permission,
@@ -238,53 +238,53 @@ namespace mumlib {
                 int32_t session,
                 string reason,
                 int32_t deny_type,
-                string name);
+                string name) override;
 
         virtual void queryUsers(
                 uint32_t n_ids,
                 uint32_t *ids,
                 uint32_t n_names,
-                string *names);
+                string *names) override;
 
         virtual void contextActionModify(
                 string action,
                 string text,
                 uint32_t m_context,
-                uint32_t operation);
+                uint32_t operation) override;
 
         virtual void contextAction(
                 int32_t session,
                 int32_t channel_id,
-                string action);
+                string action) override;
 
         virtual void userList(
                 uint32_t user_id,
                 string name,
                 string last_seen,
-                int32_t last_channel);
+                int32_t last_channel) override;
 
         virtual void permissionQuery(
                 int32_t channel_id,
                 uint32_t permissions,
-                int32_t flush);
+                int32_t flush) override;
 
         virtual void codecVersion(
                 int32_t alpha,
                 int32_t beta,
                 uint32_t prefer_alpha,
-                int32_t opus);
+                int32_t opus) override;
 
         virtual void serverConfig(
                 uint32_t max_bandwidth,
                 string welcome_text,
                 uint32_t allow_html,
                 uint32_t message_length,
-                uint32_t image_message_length);
+                uint32_t image_message_length) override;
 
         virtual void suggestConfig(
                 uint32_t version,
                 uint32_t positional,
-                uint32_t push_to_talk);
+                uint32_t push_to_talk) override;
 
     private:
         _BasicCallback_Private *impl;
diff --git a/mumlib_example.cpp b/mumlib_example.cpp
index 870e792..b4d3a45 100644
--- a/mumlib_example.cpp
+++ b/mumlib_example.cpp
@@ -12,7 +12,7 @@ public:
                        int sessionId,
                        int sequenceNumber,
                        int16_t *pcm_data,
-                       uint32_t pcm_data_size) {
+                       uint32_t pcm_data_size) override {
         mum->sendAudioData(pcm_data, pcm_data_size);
     }
 
@@ -21,7 +21,7 @@ public:
             std::vector<uint32_t> session,
             std::vector<uint32_t> channel_id,
             std::vector<uint32_t> tree_id,
-            std::string message) {
+            std::string message) override {
         mumlib::BasicCallback::textMessage(actor, session, channel_id, tree_id, message);
         mum->sendTextMessage("someone said: " + message);
     }