diff --git a/xconv.c b/xconv.c
index 12f137a..34b828d 100644
--- a/xconv.c
+++ b/xconv.c
@@ -78,7 +78,7 @@ xconv(char *src, char *dst, size_t dstlen)
 			continue;
 		}
 
-		if (is_utf_sequence(s))
+		if (!changed && is_utf_sequence(s))
 			return 0;
 
 		changed = 1;