diff --git a/hbbytecode/instructions.in b/hbbytecode/instructions.in
index 398a4e3..fb125dd 100644
--- a/hbbytecode/instructions.in
+++ b/hbbytecode/instructions.in
@@ -1,23 +1,23 @@
 // OPCODE, MNEMONIC, TYPE, DOC;
 
-0, UN,     N,    "Cause an unreachable code trap"        ;
-1, TX,     N,    "Termiante execution"                   ;
-2, NOP,    N,    "Do nothing"                            ;
+0,  UN,     N,    "Cause an unreachable code trap"        ;
+1,  TX,     N,    "Termiante execution"                   ;
+2,  NOP,    N,    "Do nothing"                            ;
 
-3, ADD,    RRR,  "Addition"                              ;
-4, SUB,    RRR,  "Subtraction"                           ;
-5, MUL,    RRR,  "Multiplication"                        ;
-6, AND,    RRR,  "Bitand"                                ;
-7, OR,     RRR,  "Bitor"                                 ;
-8, XOR,    RRR,  "Bitxor"                                ;
-9, SL,     RRR,  "Unsigned left bitshift"                ;
+3,  ADD,    RRR,  "Addition"                              ;
+4,  SUB,    RRR,  "Subtraction"                           ;
+5,  MUL,    RRR,  "Multiplication"                        ;
+6,  AND,    RRR,  "Bitand"                                ;
+7,  OR,     RRR,  "Bitor"                                 ;
+8,  XOR,    RRR,  "Bitxor"                                ;
+9,  SL,     RRR,  "Unsigned left bitshift"                ;
 10, SR,     RRR,  "Unsigned right bitshift"               ;
 11, SRS,    RRR,  "Signed right bitshift"                 ;
 12, CMP,    RRR,  "Signed comparsion"                     ;
 13, CMPU,   RRR,  "Unsigned comparsion"                   ;
 14, DIR,    RRRR, "Merged divide-remainder"               ;
 15, NEG,    RR,   "Bit negation"                          ;
-15, NOT,    RR,   "Logical negation"                      ;
+16, NOT,    RR,   "Logical negation"                      ;
 17, ADDI,   RRD,  "Addition with immediate"               ;
 18, MULI,   RRD,  "Multiplication with immediate"         ;
 19, ANDI,   RRD,  "Bitand with immediate"                 ;