Index: apertium/apertium_postchunk.cc
--- apertium/apertium_postchunk.cc.orig
+++ apertium/apertium_postchunk.cc
@@ -85,6 +85,12 @@ FILE * open_output(string const &filename)
 
 int main(int argc, char *argv[])
 {
+  if (pledge("stdio rpath wpath cpath", NULL) == -1)
+  {
+    wcerr << "pledge" << endl;
+    exit(EXIT_FAILURE);
+  }
+
   LtLocale::tryToSetLocale();
 
   Postchunk p;