diff --git a/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.mk b/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.mk
index 8212725943..ea95fd0074 100644
--- a/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.mk
+++ b/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.mk
@@ -22,4 +22,4 @@ MICROPY_PY_USSL = 1
 MICROPY_SSL_MBEDTLS = 1
 MICROPY_VFS_LFS2 = 1
 
-FROZEN_MANIFEST = $(BOARD_DIR)/manifest.py
+FROZEN_MANIFEST ?= $(BOARD_DIR)/manifest.py
diff --git a/ports/stm32/boards/NUCLEO_H743ZI2/mpconfigboard.mk b/ports/stm32/boards/NUCLEO_H743ZI2/mpconfigboard.mk
index e49a4d0d61..50df6ac629 100644
--- a/ports/stm32/boards/NUCLEO_H743ZI2/mpconfigboard.mk
+++ b/ports/stm32/boards/NUCLEO_H743ZI2/mpconfigboard.mk
@@ -1 +1,3 @@
+FROZEN_MANIFEST ?= boards/NUCLEO_H743ZI/manifest.py
+
 include boards/NUCLEO_H743ZI/mpconfigboard.mk