diff --git a/src/validation.h b/src/validation.h
index 4245b2bd1..cb60a5a46 100755
--- a/src/validation.h
+++ b/src/validation.h
@@ -22,6 +22,7 @@
 #include <algorithm>
 #include <exception>
 #include <map>
+#include <list>
 #include <set>
 #include <stdint.h>
 #include <string>