diff --git a/tutorial/wmmltohtml2 b/tutorial/wmmltohtml2
index 8e672ebe4761bc46203420ba919080b8d6f94347..fd9ceb390a82f61c2154713995d319cc7fd5b913 100755
--- a/tutorial/wmmltohtml2
+++ b/tutorial/wmmltohtml2
@@ -9,6 +9,8 @@ import ".";
 
 int main(int argc, string *argv)
 {	
+  random_seed(0); // increase cache hit potential
+
   mixed *ER=catch {
     program output=(program)argv[2];
     if (!output) error("can't cast %O to program\n",argv[2]);