diff --git a/validat1.cpp b/validat1.cpp
index 921afb00..38fe72c4 100644
--- a/validat1.cpp
+++ b/validat1.cpp
@@ -42,6 +42,7 @@
 #include "rdrand.h"
 #include "zdeflate.h"
 #include "smartptr.h"
+#include "rng.h"
 #include "cpu.h"
 
 #include <time.h>