diff --git a/test/pummel/test-vm-memleak.js b/test/pummel/test-vm-memleak.js
index 4b97b3c5b57179..b840992f30c974 100644
--- a/test/pummel/test-vm-memleak.js
+++ b/test/pummel/test-vm-memleak.js
@@ -39,7 +39,7 @@ const interval = setInterval(function() {
   } catch {
   }
 
-  const rss = process.memoryUsage().rss;
+  const rss = process.memoryUsage.rss();
   assert.ok(rss < 64 * 1024 * 1024,
             `memory usage: ${rss} (${Math.round(rss / (1024 * 1024))} MB)`);