diff --git a/src/common/fiber.cpp b/src/common/fiber.cpp
index a770effaa7..1e91d6f25a 100644
--- a/src/common/fiber.cpp
+++ b/src/common/fiber.cpp
@@ -5,7 +5,6 @@
 
 #include "common/assert.h"
 #include "common/fiber.h"
-#define MCO_USE_VMEM_ALLOCATOR
 #define MINICORO_IMPL
 #include "common/minicoro.h"