diff --git a/applications/services/expansion/expansion.c b/applications/services/expansion/expansion.c
index ef760eede6..174d91162f 100644
--- a/applications/services/expansion/expansion.c
+++ b/applications/services/expansion/expansion.c
@@ -184,7 +184,7 @@ static void expansion_control_handler_module_disconnected(
         instance->serial_id, expansion_detect_callback, instance);
 }
 
-static void expansion_control_handler_module_connection_established(
+static void expansion_control_handler_connection_established(
     Expansion* instance,
     const ExpansionMessageData* data) {
     UNUSED(data);
@@ -204,8 +204,7 @@ static const ExpansionControlHandler expansion_control_handlers[] = {
     [ExpansionMessageTypeSetListenSerial] = expansion_control_handler_set_listen_serial,
     [ExpansionMessageTypeModuleConnected] = expansion_control_handler_module_connected,
     [ExpansionMessageTypeModuleDisconnected] = expansion_control_handler_module_disconnected,
-    [ExpansionMessageTypeConnectionEstablished] =
-        expansion_control_handler_module_connection_established,
+    [ExpansionMessageTypeConnectionEstablished] = expansion_control_handler_connection_established,
 };
 
 static int32_t expansion_control(void* context) {
diff --git a/applications/services/expansion/expansion.h b/applications/services/expansion/expansion.h
index 9f810c4147..1b0879b1ec 100644
--- a/applications/services/expansion/expansion.h
+++ b/applications/services/expansion/expansion.h
@@ -51,11 +51,11 @@ void expansion_enable(Expansion* instance);
 void expansion_disable(Expansion* instance);
 
 /**
- * @brief Check support for expansion modules if its currently connected.
+ * @brief Check if an expansion module is connected.
  *
  * @param[in,out] instance pointer to the Expansion instance.
  *
- * @return Boolean indicating if the expansion module is connected.
+ * @returns true if the module is connected and initialized, false otherwise.
  */
 bool expansion_is_connected(Expansion* instance);
 
diff --git a/applications/services/expansion/expansion_worker.h b/applications/services/expansion/expansion_worker.h
index cd1da41c8b..faab2887f3 100644
--- a/applications/services/expansion/expansion_worker.h
+++ b/applications/services/expansion/expansion_worker.h
@@ -28,6 +28,7 @@ typedef enum {
  * @see expansion_worker_set_callback()
  *
  * @param[in,out] context pointer to a user-defined object.
+ * @param[in] reason reason for the callback.
  */
 typedef void (*ExpansionWorkerCallback)(void* context, ExpansionWorkerCallbackReason reason);