diff --git a/zorg/buildbot/builders/sanitizers/buildbot_functions.sh b/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
index 0b541124..46a4db47 100755
--- a/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
+++ b/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -eu
+set -eux
 
 ulimit -Ss 12288