diff --git a/bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig b/bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig
index a73ae472d7..94669d3736 100644
--- a/bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig
+++ b/bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig
@@ -137,7 +137,6 @@ menu "On-chip Peripheral Drivers"
         select RT_USING_SDIO
         select RT_USING_DFS
         select RT_USING_DFS_ELMFAT
-        select RT_USING_LIBC
         select RT_LIBC_USING_TIME
         default y
 
diff --git a/bsp/stm32/stm32l475-atk-pandora/board/Kconfig b/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
index d71766c5d1..d4ea946684 100644
--- a/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
+++ b/bsp/stm32/stm32l475-atk-pandora/board/Kconfig
@@ -137,8 +137,8 @@ menu "Onboard Peripheral Drivers"
             select RT_WLAN_PROT_LWIP_PBUF_FORCE
             select RT_USING_LWIP
             select RT_USING_LIBC
-            select RT_USING_POSIX
             select RT_USING_DFS
+            select DFS_USING_POSIX
             select PKG_USING_FAL
             select PKG_USING_EASYFLASH
             select RT_USING_WIFI_6181_LIB
diff --git a/components/cplusplus/Kconfig b/components/cplusplus/Kconfig
index dfab433da0..42b5cf9556 100644
--- a/components/cplusplus/Kconfig
+++ b/components/cplusplus/Kconfig
@@ -10,7 +10,7 @@ if RT_USING_CPLUSPLUS
         bool "Enable c++11 threading feature support"
         default n
         select RT_USING_LIBC
-        select RT_USING_DFS
+        select RT_LIBC_USING_FILEIO
         select RT_USING_PTHREADS
         select RT_USING_RTC
 
diff --git a/components/utilities/ymodem/ry_sy.c b/components/utilities/ymodem/ry_sy.c
index caad51d6cd..3f3b022d7e 100644
--- a/components/utilities/ymodem/ry_sy.c
+++ b/components/utilities/ymodem/ry_sy.c
@@ -17,6 +17,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifndef DFS_USING_POSIX
+#error "Please enable DFS_USING_POSIX"
+#endif
+
 struct custom_ctx
 {
     struct rym_ctx parent;