diff --git a/main.c b/main.c
index dd06aa47..4e8251e1 100644
--- a/main.c
+++ b/main.c
@@ -396,6 +396,8 @@ main (argc, argv, envp)
   PATH_VAR (current_directory);
   char *directory_before_chdir;
 
+mcheck(0);
+
   default_goal_file = 0;
   reading_filename = 0;
   reading_lineno_ptr = 0;