diff --git a/nbase/nbase.h b/nbase/nbase.h
index 462bfe964..f8a465521 100644
--- a/nbase/nbase.h
+++ b/nbase/nbase.h
@@ -479,6 +479,7 @@ int get_random_bytes(void *buf, int numbytes);
 int get_random_int();
 unsigned short get_random_ushort();
 unsigned int get_random_uint();
+u64 get_random_u64();
 u32 get_random_u32();
 u16 get_random_u16();
 u8 get_random_u8();
diff --git a/nbase/nbase_rnd.c b/nbase/nbase_rnd.c
index b31b0305b..a044f5103 100644
--- a/nbase/nbase_rnd.c
+++ b/nbase/nbase_rnd.c
@@ -238,6 +238,13 @@ unsigned int get_random_uint() {
   return i;
 }
 
+u64 get_random_u64() {
+  u64 i;
+  get_random_bytes(&i, sizeof(i));
+  return i;
+}
+
+
 u32 get_random_u32() {
   u32 i;
   get_random_bytes(&i, sizeof(i));