diff --git a/js/src/jit-test/tests/gc/bug-1505622.js b/js/src/jit-test/tests/gc/bug-1505622.js
index 4648aa91938bd..dff4d17b2e4ff 100644
--- a/js/src/jit-test/tests/gc/bug-1505622.js
+++ b/js/src/jit-test/tests/gc/bug-1505622.js
@@ -131,12 +131,28 @@ small
 heap
 limit
 .
+gc
+(
+)
+;
+let
+currentSize
+=
+gcparam
+(
+"
+gcBytes
+"
+)
+;
 gcparam
 (
 "
 maxBytes
 "
-1024
+currentSize
++
+16
 *
 1024
 )