diff --git a/bin/tests/system/filter-aaaa/prereq.sh b/bin/tests/system/filter-aaaa/prereq.sh
index 096ab47459..39c0369b8a 100644
--- a/bin/tests/system/filter-aaaa/prereq.sh
+++ b/bin/tests/system/filter-aaaa/prereq.sh
@@ -19,5 +19,5 @@ then
     :
 else
     echo "I:This test requires --enable-filter-aaaa at compile time." >&2
-    exit 1
+    exit 255
 fi