Index: test/dfsan/custom.cc
===================================================================
--- test/dfsan/custom.cc
+++ test/dfsan/custom.cc
@@ -424,9 +424,9 @@
 
 void test_gethostname() {
   char buf[1024];
-  dfsan_set_label(i_label, buf + 2, 2);
+  dfsan_set_label(i_label, buf + 1, 1);
   assert(gethostname(buf, sizeof(buf)) == 0);
-  ASSERT_READ_ZERO_LABEL(buf + 2, 2);
+  ASSERT_READ_ZERO_LABEL(buf + 1, 1);
 }
 
 void test_getrlimit() {