diff --git a/src/vm-limit.c b/src/vm-limit.c

index ca7ac4f..78fa702 100644

--- a/src/vm-limit.c

+++ b/src/vm-limit.c

@@ -292,7 +292,7 @@ memory_warnings (POINTER start, void (*warnfun) (const char *))

   else

     data_space_start = start_of_data ();

-  warn_function = warnfun;

+  warn_function = NULL;

   __after_morecore_hook = check_memory_limits;

   /* Force data limit to be recalculated on each run.  */