diff --git a/src/eressea/lua/eressea.cpp b/src/eressea/lua/eressea.cpp
index 070903f5a..3a045525b 100644
--- a/src/eressea/lua/eressea.cpp
+++ b/src/eressea/lua/eressea.cpp
@@ -85,6 +85,8 @@ init_summary()
 static int
 write_summary()
 {
+  assert(sum_begin
+      || !"init_summary must be called before before write_summary");
   if (sum_begin) {
     summary * sum_end = make_summary();
     report_summary(sum_end, sum_begin, false);
diff --git a/src/scripts/wdw-run.lua b/src/scripts/wdw-run.lua
index 5613d6399..e836d0a31 100644
--- a/src/scripts/wdw-run.lua
+++ b/src/scripts/wdw-run.lua
@@ -5,6 +5,7 @@ function process(orders)
     print("could not read game")
     return -1
   end
+  init_summary()
 
   -- read the orders file
   read_orders(orders)