diff --git a/src/convert.asm b/src/convert.asm
index b945631..095515a 100644
--- a/src/convert.asm
+++ b/src/convert.asm
@@ -130,8 +130,8 @@ hex2str:
 		div	r8
 		cmp	rdx, 10
 		jb	.num
-		cmp	r9, 1
-		jne	.lower
+		cmp	r9, 0
+		je	.lower
 		;.upper:
 		add	rdx, 55
 		jmp	.push