diff --git a/os/rt/ports/ARMCMx/cmsis_os/cmsis_os.h b/os/rt/ports/ARMCMx/cmsis_os/cmsis_os.h
index 12a37eeaa..4e5ceaa99 100644
--- a/os/rt/ports/ARMCMx/cmsis_os/cmsis_os.h
+++ b/os/rt/ports/ARMCMx/cmsis_os/cmsis_os.h
@@ -76,7 +76,7 @@
 /**
  * @brief   System tick frequency.
  */
-#define osKernelSysTickFrequency    CH_CFG_FREQUENCY
+#define osKernelSysTickFrequency    CH_CFG_ST_FREQUENCY
 
 /*===========================================================================*/
 /* Module pre-compile time settings.                                         */