diff --git a/include/c/motes.h b/include/c/motes.h
index f05f716ba..d833c94ea 100644
--- a/include/c/motes.h
+++ b/include/c/motes.h
@@ -1187,6 +1187,7 @@
 #   define c3__void   c3_s4('v','o','i','d')
 #   define c3__vorp   c3_s4('v','o','r','p')
 #   define c3__way    c3_s3('w','a','y')
+#   define c3__wack   c3_s4('w','a','c','k')
 #   define c3__wail   c3_s4('w','a','i','l')
 #   define c3__wake   c3_s4('w','a','k','e')
 #   define c3__wamp   c3_s4('w','a','m','p')
diff --git a/vere/sist.c b/vere/sist.c
index 620ead285..8bafa3d8f 100644
--- a/vere/sist.c
+++ b/vere/sist.c
@@ -1608,6 +1608,19 @@ sist_key(u3_noun des)
 void
 u3_sist_boot(void)
 {
+  //  iterate entropy
+  //
+  {
+    c3_w    eny_w[16];
+    u3_noun eny;
+
+    c3_rand(eny_w);
+    eny = u3i_words(16, eny_w);
+
+    u3v_plan(u3nt(u3_blip, c3__arvo, u3_nul), u3nc(c3__wack, u3k(eny)));
+    u3z(eny);
+  }
+
   if ( c3n == u3_Host.ops_u.nuu ) {
     _sist_rest();