2 files changed, 2 insertions, 2 deletions
diff --git a/roman.c b/roman.c
index 6606e25..d669cc2 100644
--- a/roman.c
+++ b/roman.c
@@ -52,7 +52,7 @@ dectoroman(int n, char *buf, ulong len)
 			n -= decimal[i];
 		}
 	}
-	buf[len-1] = 0;
+	buf[o] = 0;
 	return 0;
 }
 
diff --git a/test.c b/test.c
index fb71a58..d0532d8 100644
--- a/test.c
+++ b/test.c
@@ -29,7 +29,7 @@ main(int argc, char *argv[])
 	if(argc != 0)
 		usage();
 
-	if(decimal >= 0){
+	if(decimal > 0){
 		if(dectoroman(decimal, buf, sizeof buf) < 0)
 			sysfatal("dectoroman: %r");
 		print("%s\n", buf);