diff --git a/components/libc/newlib/syscalls.c b/components/libc/newlib/syscalls.c
index 5b829f47532f30378250ff665b8baf80c81e590a..388d240c9449c136b7611c4fe075fef1ec3c8147 100644
--- a/components/libc/newlib/syscalls.c
+++ b/components/libc/newlib/syscalls.c
@@ -3,6 +3,14 @@
 #include <sys/time.h>
 #include <rtthread.h>
 
+#ifdef RT_USING_DFS
+#include <dfs_posix.h>
+#endif
+
+#ifdef RT_USING_PTHREADS 
+#include <pthread.h>
+#endif
+
 /* Reentrant versions of system calls.  */
 
 int