diff --git a/minecraft/platform/IPlatformInput.h b/minecraft/platform/IPlatformInput.h
index 3e81397ae..183e3e326 100644
--- a/minecraft/platform/IPlatformInput.h
+++ b/minecraft/platform/IPlatformInput.h
@@ -2,6 +2,8 @@
 
 #include "PlatformTypes.h"
 
+// TODO: migrate C-style callbacks (int (*Func)(void*, ...), void* lpParam)
+// to std::function or std::function_ref (C++26).
 class IPlatformInput {
 public:
     enum EKeyboardMode {
diff --git a/minecraft/platform/IPlatformProfile.h b/minecraft/platform/IPlatformProfile.h
index 1141dcebf..b49ac08a5 100644
--- a/minecraft/platform/IPlatformProfile.h
+++ b/minecraft/platform/IPlatformProfile.h
@@ -8,6 +8,8 @@
 
 class CXuiStringTable;
 
+// TODO: migrate C-style callbacks (int (*Func)(void*, ...), void* lpParam)
+// to std::function or std::function_ref (C++26).
 class IPlatformProfile {
 public:
     struct PROFILESETTINGS {
diff --git a/minecraft/platform/IPlatformStorage.h b/minecraft/platform/IPlatformStorage.h
index 53c518b29..0c706af04 100644
--- a/minecraft/platform/IPlatformStorage.h
+++ b/minecraft/platform/IPlatformStorage.h
@@ -13,6 +13,8 @@ struct SAVE_DETAILS;
 using PSAVE_DETAILS = SAVE_DETAILS*;
 class C4JStringTable;
 
+// TODO: migrate C-style callbacks (int (*Func)(void*, ...), void* lpParam)
+// to std::function or std::function_ref (C++26).
 class IPlatformStorage {
 public:
     // Enums live here so both the interface consumer and the concrete