diff --git a/config/examples/low_memory.yaml b/config/examples/low_memory.yaml
index a4bd9325..ab1f4cf6 100644
--- a/config/examples/low_memory.yaml
+++ b/config/examples/low_memory.yaml
@@ -13,6 +13,7 @@
 
 DUK_USE_PREFER_SIZE: true
 DUK_USE_EXEC_PREFER_SIZE: true
+DUK_USE_FAST_REFCOUNT_DEFAULT: false
 DUK_USE_AUGMENT_ERROR_CREATE: false
 DUK_USE_AUGMENT_ERROR_THROW: false
 DUK_USE_TRACEBACKS: false