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diff --git a/Python/compile.c b/Python/compile.c
index 373440e2172c7d6c484283b6e37c36f851c818aa..c77091ea25a0b695fe12b528f70be79f7444bb36 100644 (file)
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -3439,10 +3439,10 @@ static int
 instrsize(struct instr *instr)
 {
        if (!instr->i_hasarg)
-               return 1;
+               return 1;       /* 1 byte for the opcode*/
        if (instr->i_oparg > 0xffff)
-               return 6;
-       return 3;
+               return 6;       /* 1 (opcode) + 1 (EXTENDED_ARG opcode) + 2 (oparg) + 2(oparg extended) */
+       return 3;               /* 1 (opcode) + 2 (oparg) */
 }
 
 static int