diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.h b/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.h
index f556bb2525..09b5cfd1ed 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.h
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/RTWInterface.h
@@ -158,8 +158,6 @@ protected:
     char _ip_address[IPADDR_STRLEN_MAX];
     char _netmask[NSAPI_IPv4_SIZE];
     char _gateway[NSAPI_IPv4_SIZE];
-    void *scan_sema;
-    signed int scan_num;
 };
 
 #endif