Index: lttoolbox/lt_tmxproc.cc
--- lttoolbox/lt_tmxproc.cc.orig
+++ lttoolbox/lt_tmxproc.cc
@@ -22,6 +22,7 @@
 #include <getopt.h>
 #include <iostream>
 #include <libgen.h>
+#include <unistd.h>
 
 using namespace std;
 
@@ -43,6 +44,11 @@ void checkValidity(FSTProcessor const &fstp)
 
 int main(int argc, char *argv[])
 {
+  if (pledge("stdio rpath wpath cpath", NULL) == -1) {
+    wcerr << "pledge" << endl;
+    exit(EXIT_FAILURE);
+  }
+
   FILE *input = stdin, *output = stdout;
   LtLocale::tryToSetLocale();
   FSTProcessor fstp;