diff --git a/firmware/config/stm32f4ems/chconf.h b/firmware/config/stm32f4ems/chconf.h
index 331b4278f3..efc2734664 100644
--- a/firmware/config/stm32f4ems/chconf.h
+++ b/firmware/config/stm32f4ems/chconf.h
@@ -407,7 +407,9 @@ extern "C"
  * @note    Requires @p CH_CFG_USE_WAITEXIT.
  * @note    Requires @p CH_CFG_USE_HEAP and/or @p CH_CFG_USE_MEMPOOLS.
  */
+#if !defined(CH_CFG_USE_DYNAMIC)
 #define CH_CFG_USE_DYNAMIC                  FALSE
+#endif
 
 /** @} */