diff --git a/firmware/config/stm32f4ems/chconf.h b/firmware/config/stm32f4ems/chconf.h
index 5cf4405c5d..3cf817cdb6 100644
--- a/firmware/config/stm32f4ems/chconf.h
+++ b/firmware/config/stm32f4ems/chconf.h
@@ -28,9 +28,6 @@
 #ifndef CHCONF_H
 #define CHCONF_H
 
-// todo: access some existing configuration field
-#define CORE_CLOCK 168000000
-
 #define _CHIBIOS_RT_CONF_
 #define _CHIBIOS_RT_CONF_VER_5_1_
 
diff --git a/firmware/config/stm32f7ems/chconf.h b/firmware/config/stm32f7ems/chconf.h
index 8a70710bb7..286f6fc4bc 100644
--- a/firmware/config/stm32f7ems/chconf.h
+++ b/firmware/config/stm32f7ems/chconf.h
@@ -28,9 +28,6 @@
 #ifndef CHCONF_H
 #define CHCONF_H
 
-// todo: access some existing configuration field
-#define CORE_CLOCK 216000000
-
 #define _CHIBIOS_RT_CONF_
 #define _CHIBIOS_RT_CONF_VER_5_1_
 
diff --git a/firmware/global.h b/firmware/global.h
index 18e40f24d3..e55ed64389 100644
--- a/firmware/global.h
+++ b/firmware/global.h
@@ -52,6 +52,10 @@ typedef unsigned int time_t;
 #define VALUE(x) VALUE_TO_STRING(x)
 #define VAR_NAME_VALUE(var) #var "="  VALUE(var)
 
+#define CORE_CLOCK STM32_SYSCLK
+//#pragma message(VAR_NAME_VALUE(CORE_CLOCK))
+
+
 /**
  * project-wide default thread stack size
  * See also PORT_INT_REQUIRED_STACK