Index: exec.c
==================================================================
--- exec.c
+++ exec.c
@@ -910,10 +910,11 @@
     case OP_STRENGTH_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->strength=t1.u; break;
     case OP_SOUND: StackReq(2,0); t2=Pop(); t1=Pop(); break; // Sound not implemented at this time
     case OP_SUB: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u-t2.u)); break;
     case OP_SWAP: StackReq(2,2); t1=Pop(); t2=Pop(); Push(t1); Push(t2); break;
     case OP_TRACE: StackReq(3,0); trace_stack(obj); break;
+    case OP_TUCK: StackReq(2,3); t2=Pop(); t1=Pop(); Push(t2); Push(t1); Push(t2); break;
     case OP_USERSTATE: StackReq(0,1); if(o->oflags&OF_USERSTATE) Push(NVALUE(1)); else Push(NVALUE(0)); break;
     case OP_USERSTATE_C: StackReq(1,1); GetFlagOf(OF_USERSTATE); break;
     case OP_USERSTATE_E: NoIgnore(); StackReq(1,0); if(v_bool(Pop())) o->oflags|=OF_USERSTATE; else o->oflags&=~OF_USERSTATE; break;
     case OP_USERSTATE_EC: NoIgnore(); StackReq(2,0); SetFlagOf(OF_USERSTATE); break;
     case OP_USERSIGNAL: StackReq(0,1); if(o->oflags&OF_USERSIGNAL) Push(NVALUE(1)); else Push(NVALUE(0)); break;