Index: apertium/apertium_pretransfer.cc
--- apertium/apertium_pretransfer.cc.orig
+++ apertium/apertium_pretransfer.cc
@@ -19,9 +19,17 @@
 #include <lttoolbox/cli.h>
 #include <lttoolbox/file_utils.h>
 #include <lttoolbox/lt_locale.h>
+#include <iostream>
+#include <unistd.h>
 
 int main(int argc, char *argv[])
 {
+  if (pledge("stdio rpath wpath cpath", NULL) == -1)
+  {
+    std::wcerr << L"pledge" << std::endl;
+    exit(EXIT_FAILURE);
+  }
+
   LtLocale::tryToSetLocale();
   CLI cli("split compounds in preparation for transfer");
   cli.add_bool_arg('e', "compounds", "treat ~ as compound separator");
