diff --git a/spec.md b/spec.md
index 7624221f..766262e1 100644
--- a/spec.md
+++ b/spec.md
@@ -245,7 +245,7 @@ HoleyBytes assembly format is not defined, this is just a weak description
 of `hbasm` syntax.
 
 - Opcode names correspond to specified opcode names, lowercase (`nop`)
-- Parameters are separated by comma (`addi r0, 1`)
+- Parameters are separated by comma (`addi r0, r0, 1`)
 - Instructions are separated by either line feed or semicolon
 - Registers are represented by `r` followed by the number (`r10`)
 - Labels are defined by label name followed with colon (`loop:`)