diff --git a/port/config/config_liteos_m.h b/port/config/config_liteos_m.h
index d01905f7fe25da30cec0adfecf8a26619296db2c..007e47f97e562dcb47418fb61787a4510f9f02b7 100755
--- a/port/config/config_liteos_m.h
+++ b/port/config/config_liteos_m.h
@@ -43,7 +43,6 @@
  #include <stdlib.h>
  #include <stdio.h>
  
- #define MBEDTLS_ECP_RESTARTABLE 1
 /**
  * \def MBEDTLS_HAVE_ASM
  *