diff --git a/zx-brainfuck/main.asm b/zx-brainfuck/main.asm
index 1b2316d..3c5670c 100644
--- a/zx-brainfuck/main.asm
+++ b/zx-brainfuck/main.asm
@@ -42,7 +42,7 @@ read_bf
     cp OP_INC_VAL
     jr z, F_INC_VAL
 
-    ; +
+    ; -
     cp OP_DEC_VAL
     jr z, F_DEC_VAL