diff --git a/apps/openmw/mwscript/docs/vmformat.txt b/apps/openmw/mwscript/docs/vmformat.txt
index cad1d3304e..1532cacf19 100644
--- a/apps/openmw/mwscript/docs/vmformat.txt
+++ b/apps/openmw/mwscript/docs/vmformat.txt
@@ -21,6 +21,17 @@ Segment 4:
 opcodes 0x200-0x3ff unused
 
 Segment 5:
-op 2000000: push 1 if cell has changed since last frame, 0 if not
-opcodes 0x2000001-0x3ffffff unused
+op 2000000: CellChanged
+op 2000001: Say
+op 2000002: SayDone
+op 2000003: StreamMusic
+op 2000004: PlaySound
+op 2000005: PlaySoundVP
+op 2000006: PlaySound3D
+op 2000007: PlaySound3DVP
+op 2000008: PlayLoopSound3D
+op 2000009: PlayLoopSound3DVP
+op 200000a: StopSound
+op 200000b: GetSoundPlaying
+opcodes 0x200000c-0x3ffffff unused
 
diff --git a/apps/openmw/mwsound/extensions.cpp b/apps/openmw/mwsound/extensions.cpp
index fe9bf9d374..ba3a8352c2 100644
--- a/apps/openmw/mwsound/extensions.cpp
+++ b/apps/openmw/mwsound/extensions.cpp
@@ -206,11 +206,11 @@ namespace MWSound
         extensions.registerFunction ("saydone", 'l', "", Script::opcodeSayDone);
         extensions.registerInstruction ("streammusic", "S", Script::opcodeStreamMusic);
         extensions.registerInstruction ("playsound", "S", Script::opcodePlaySound);
-        extensions.registerInstruction ("playsoundvp", "Sll", Script::opcodePlaySoundVP);
+        extensions.registerInstruction ("playsoundvp", "Sff", Script::opcodePlaySoundVP);
         extensions.registerInstruction ("playsound3d", "S", Script::opcodePlaySound3D);
-        extensions.registerInstruction ("playsound3dvp", "Sll", Script::opcodePlaySound3DVP);
+        extensions.registerInstruction ("playsound3dvp", "Sff", Script::opcodePlaySound3DVP);
         extensions.registerInstruction ("playloopsound3d", "S", Script::opcodePlayLoopSound3D);
-        extensions.registerInstruction ("playloopsound3dvp", "Sll",
+        extensions.registerInstruction ("playloopsound3dvp", "Sff",
             Script::opcodePlayLoopSound3DVP);
         extensions.registerInstruction ("stopsound", "S", Script::opcodeStopSound);
         extensions.registerFunction ("getsoundplaying", 'l', "S", Script::opcodeGetSoundPlaying);