diff -up ./jitterentropy-library/jitterentropy.h.rdtsc ./jitterentropy-library/jitterentropy.h
--- ./jitterentropy-library/jitterentropy.h.rdtsc	2018-09-06 15:01:40.000000000 -0400
+++ ./jitterentropy-library/jitterentropy.h	2020-02-18 12:47:10.465684582 -0500
@@ -44,8 +44,12 @@
 
 #ifdef __KERNEL__
 #include "jitterentropy-base-kernel.h"
+#else /* __KERNEL__ */
+#ifdef __x86_64__
+#include "arch/jitterentropy-base-x86.h"
 #else
 #include "jitterentropy-base-user.h"
+#endif /* __x86_64__ */
 #endif /* __KERNEL__ */
 
 /* The entropy pool */
diff -up ./rngd_jitter.c.rdtsc ./rngd_jitter.c
--- ./rngd_jitter.c.rdtsc	2020-02-18 12:47:22.490646896 -0500
+++ ./rngd_jitter.c	2020-02-18 12:46:40.650778022 -0500
@@ -27,6 +27,9 @@
 #include <unistd.h>
 #include <signal.h>
 #include <setjmp.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include "rng-tools-config.h"
 
 #include <jitterentropy.h>