diff --git a/doc/Changelog b/doc/Changelog
index cb0b96cca..8cbd7d319 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -5,6 +5,7 @@
 	  used, and ignored if found in unbound.conf.
 	- Rename tls-additional-ports to tls-additional-port, because every
 	  line adds one port.
+	- Fix buffer size warning in unit test.
 
 6 June 2018: Wouter
 	- Patch to fix openwrt for mac os build darwin detection in configure.
diff --git a/testcode/unitneg.c b/testcode/unitneg.c
index 2b67df182..849d07d8b 100644
--- a/testcode/unitneg.c
+++ b/testcode/unitneg.c
@@ -94,7 +94,7 @@ static void print_neg_cache(struct val_neg_cache* neg)
 /** get static pointer to random zone name */
 static char* get_random_zone(void)
 {
-	static char zname[256];
+	static char zname[36];
 	int labels = random() % 3;
 	int i;
 	char* p = zname;