diff --git a/hostname.py b/hostname.py
index b19ebe9..316aa53 100755
--- a/hostname.py
+++ b/hostname.py
@@ -39,6 +39,6 @@ if __name__ == "__main__" :
 
 	for i in range(n) :
 		for j in range(c) :
-			hostname = hostnames[random.randint(0, len(hostnames))]
+			hostname = hostnames[random.randint(0, len(hostnames)-1)]
 			sys.stdout.write("%-20s" % (hostname))
-		sys.stdout.write("\n")
\ No newline at end of file
+		sys.stdout.write("\n")