diff --git a/python/tvm/micro/device/arm/stm32f746xx.py b/python/tvm/micro/device/arm/stm32f746xx.py
index 746958504eda..997093b0c349 100644
--- a/python/tvm/micro/device/arm/stm32f746xx.py
+++ b/python/tvm/micro/device/arm/stm32f746xx.py
@@ -32,7 +32,7 @@
     "text": (18000, MemConstraint.ABSOLUTE_BYTES),
     "rodata": (100, MemConstraint.ABSOLUTE_BYTES),
     "data": (100, MemConstraint.ABSOLUTE_BYTES),
-    "bss": (600, MemConstraint.ABSOLUTE_BYTES),
+    "bss": (640, MemConstraint.ABSOLUTE_BYTES),
     "args": (4096, MemConstraint.ABSOLUTE_BYTES),
     "heap": (100.0, MemConstraint.WEIGHT),
     "workspace": (64000, MemConstraint.ABSOLUTE_BYTES),