diff --git a/ref/makefile b/ref/makefile
index dc8e654..39f4cdb 100644
--- a/ref/makefile
+++ b/ref/makefile
@@ -5,7 +5,7 @@ all: bin/uxn
 run: all
 	@ wc -c bin/uxn
 	@ bin/uxn test.bin "Text from arg"
-test:
+test: all
 	@ bin/uxn opc-test.bin
 format:
 	@ clang-format -i uxn.c
diff --git a/ref/uxn.c b/ref/uxn.c
index 12b06dc..be6410d 100644
--- a/ref/uxn.c
+++ b/ref/uxn.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 
 #define PEEK2(d) (*(d) << 8 | (d)[1])
-#define POKE2(d, v) { *(d) = (v) >> 8; (d)[1] = (v); }
 
 typedef unsigned char Uint8;
 typedef signed char Sint8;
@@ -71,7 +70,7 @@ uxn_eval(Uxn *u, Uint16 pc)
 		switch(ins) {
 			case 0x00: /* BRK */ return 1;
 			case 0x20: /* JCI */ POP1(b) if(!b) { pc += 2; break; }
-			case 0x40: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
+			case 0x40: /* JMI */ a = ram[pc++] << 8 | ram[pc++]; pc += a; break;
 			case 0x60: /* JSI */ PUSH2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
 			case 0x80: case 0xc0: /* LIT  */ PUSH1(ram[pc++]) break;
 			case 0xa0: case 0xe0: /* LIT2 */ PUSH1(ram[pc++]) PUSH1(ram[pc++]) break;