diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index dfcbb1fc0..e16a55104 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -408,6 +408,7 @@ int DivEngine::getTotalChannelCount() {
   return chans;
 }
 
+// TODO: rewrite this function (again). it's an unreliable mess.
 const char* DivEngine::getSongSystemName() {
   switch (song.systemLen) {
     case 0: