diff --git a/src/uxn.c b/src/uxn.c
index e89b19e..ff6dbb1 100644
--- a/src/uxn.c
+++ b/src/uxn.c
@@ -61,7 +61,7 @@ uxn_eval(Uxn *u, Uint16 pc)
 			/* ALU */
 			case 0x01: /* INC  */ t=T;         SET(1, 0) PUT(0, t + 1) break;                           case 0x21: t=T2;           SET(2, 0) PUT2(0, t + 1) break;
 			case 0x02: /* POP  */              SET(1,-1) break;                                         case 0x22:                 SET(2,-2) break;
-			case 0x03: /* NIP  */ t=T;         SET(1,-1) PUT(0, t) break;                               case 0x23: t=T2;           SET(2,-2) PUT2(0, t) break;
+			case 0x03: /* NIP  */ t=T;         SET(2,-1) PUT(0, t) break;                               case 0x23: t=T2;           SET(4,-2) PUT2(0, t) break;
 			case 0x04: /* SWP  */ t=T;n=N;     SET(2, 0) PUT(0, n) PUT(1, t) break;                     case 0x24: t=T2;n=N2;      SET(4, 0) PUT2(0, n) PUT2(2, t) break;
 			case 0x05: /* ROT  */ t=T;n=N;l=L; SET(3, 0) PUT(0, l) PUT(1, t) PUT(2, n) break;           case 0x25: t=T2;n=N2;l=L2; SET(6, 0) PUT2(0, l) PUT2(2, t) PUT2(4, n) break;
 			case 0x06: /* DUP  */ t=T;         SET(1, 1) PUT(0, t) PUT(1, t) break;                     case 0x26: t=T2;           SET(2, 2) PUT2(0, t) PUT2(2, t) break;