diff --git a/src/engine/platform/ay.cpp b/src/engine/platform/ay.cpp
index 7018824b9..8df5bd4ce 100644
--- a/src/engine/platform/ay.cpp
+++ b/src/engine/platform/ay.cpp
@@ -471,6 +471,8 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
       return 15;
       break;
     case DIV_CMD_PRE_PORTA:
+      // TODO: FIX wtr_envelope.dmf
+      // the brokenPortaArp update broke it
       if (chan[c.chan].active && c.value2) {
         if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_AY));
       }