diff --git a/components/libc/newlib/syscalls.c b/components/libc/newlib/syscalls.c
new file mode 100644
index 0000000000..7768612da2
--- /dev/null
+++ b/components/libc/newlib/syscalls.c
@@ -0,0 +1,8 @@
+#include <reent.h>
+
+int _fork_r (struct _reent *ptr)
+{
+	/* return "not supported" */
+	ptr->errno = ENOTSUP;
+	return -1;
+}