diff --git a/workspace_tools/targets.py b/workspace_tools/targets.py
index 3efd014359..685cea4171 100644
--- a/workspace_tools/targets.py
+++ b/workspace_tools/targets.py
@@ -630,6 +630,7 @@ class ARCH_MAX(Target):
         self.extra_labels = ['STM', 'STM32F4', 'STM32F407', 'STM32F407VG']
         self.supported_toolchains = ["ARM", "uARM", "GCC_ARM"]
         self.supported_form_factors = ["ARDUINO"]
+        self.macros = ['LSI_VALUE=32000']
 
     def program_cycle_s(self):
         return 2