diff --git a/firmware/config/stm32f4ems/chconf.h b/firmware/config/stm32f4ems/chconf.h
index d608f3345a..830248fa0f 100644
--- a/firmware/config/stm32f4ems/chconf.h
+++ b/firmware/config/stm32f4ems/chconf.h
@@ -376,7 +376,9 @@ extern "C"
  *
  * @note    The default is @p FALSE.
  */
+#ifndef CH_DBG_ENABLE_ASSERTS
 #define CH_DBG_ENABLE_ASSERTS               TRUE
+#endif
 
 /**
  * @brief   Debug option, trace buffer.
@@ -385,7 +387,9 @@ extern "C"
  *
  * @note    The default is @p FALSE.
  */
+#ifndef CH_DBG_ENABLE_TRACE
 #define CH_DBG_ENABLE_TRACE                 TRUE
+#endif
 
 /**
  * @brief   Debug option, stack checks.
@@ -397,7 +401,9 @@ extern "C"
  * @note    The default failure mode is to halt the system with the global
  *          @p panic_msg variable set to @p NULL.
  */
+#ifndef CH_DBG_ENABLE_STACK_CHECK
 #define CH_DBG_ENABLE_STACK_CHECK           TRUE
+#endif
 
 /**
  * @brief   Debug option, stacks initialization.
@@ -407,7 +413,9 @@ extern "C"
  *
  * @note    The default is @p FALSE.
  */
+#ifndef CH_DBG_FILL_THREADS
 #define CH_DBG_FILL_THREADS                 TRUE
+#endif
 
 /**
  * @brief   Debug option, threads profiling.