diff --git a/sys/asan.sh b/sys/asan.sh
index 68cef314508e4..766e0d25bd3cf 100755
--- a/sys/asan.sh
+++ b/sys/asan.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 # ASAN="address leak memory undefined"
-ASAN=${ASAN:="address"}
+ASAN=${ASAN:="address undefined"}
 
 printf "\033[32m"
 echo "========================================================================="