diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index acc4e7607..665409d67 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -117,6 +117,13 @@ const char* cmdName[DIV_CMD_MAX]={
   "QSOUND_ECHO_DELAY",
   "QSOUND_ECHO_LEVEL",
 
+  "X1_010_ENVELOPE_SHAPE",
+  "X1_010_ENVELOPE_ENABLE",
+  "X1_010_ENVELOPE_MODE",
+  "X1_010_ENVELOPE_PERIOD",
+  "X1_010_ENVELOPE_SLIDE",
+  "X1_010_AUTO_ENVELOPE",
+
   "ALWAYS_SET_VOLUME"
 };