diff --git a/applications/services/expansion/expansion.h b/applications/services/expansion/expansion.h
index 6643291a9..9f810c414 100644
--- a/applications/services/expansion/expansion.h
+++ b/applications/services/expansion/expansion.h
@@ -55,6 +55,7 @@ void expansion_disable(Expansion* instance);
  *
  * @param[in,out] instance pointer to the Expansion instance.
  *
+ * @return Boolean indicating if the expansion module is connected.
  */
 bool expansion_is_connected(Expansion* instance);