diff --git a/zscript/mfx_handler.zsc b/zscript/mfx_handler.zsc
index 66a6f13..ec278ac 100644
--- a/zscript/mfx_handler.zsc
+++ b/zscript/mfx_handler.zsc
@@ -156,12 +156,12 @@ Class MariFXHandler : StaticEventHandler
 		PlayerInfo p = players[consoleplayer];
 		if ( e.Name ~== "loadmfxpreset" )
 		{
-			int slot = clamp(mfx_presetslot,0,7);
+			int slot = clamp(mfx_presetslot,0,MFX_NUMPRESETS-1);
 			MFXPresetUtility.LoadPreset(slot);
 		}
 		else if ( e.Name ~== "savemfxpreset" )
 		{
-			int slot = clamp(mfx_presetslot,0,7);
+			int slot = clamp(mfx_presetslot,0,MFX_NUMPRESETS-1);
 			MFXPresetUtility.SavePreset(slot);
 		}
 		else if ( e.Name ~== "resetmfxvars" )