diff --git a/NT/tools/rntcc b/NT/tools/rntcc
index 744ef737e4884578adca101f3d9de9107dcfb8ce..7e7f11e501f391efb20382750e90f1b184f23014 100755
--- a/NT/tools/rntcc
+++ b/NT/tools/rntcc
@@ -347,7 +347,7 @@ int main(int argc, string *argv)
 		     "#!/usr/local/bin/pike\n"
 		     "inherit \""+find_lib_location()+"\";\n"
 		     "int main(int argc, string *argv) {\n"
-		     "argv[0]+=\".exe\";\n"
+		     "argv[0]=" + sprintf ("%O", output + ".exe") + ";\n"
 		     "argv[0]=getenv(\"NTDRIVE\")+fixpath(combine_path(getcwd(),argv[0]));\n"
 		     "  int ret=silent_do_cmd(argv);\n"
 		     "  exit(ret);\n"
diff --git a/NT/tools/rntcl b/NT/tools/rntcl
index 656894ae990add69e42ea537d6f1bf160646138a..ff99db3ffc89218dfb56524cf2b0898d5f975159 100755
--- a/NT/tools/rntcl
+++ b/NT/tools/rntcl
@@ -308,7 +308,7 @@ int main(int argc, string *argv)
 		     "#!/usr/local/bin/pike\n"
 		     "inherit \""+find_lib_location()+"\";\n"
 		     "int main(int argc, string *argv) {\n"
-		     "argv[0]+=\".exe\";\n"
+		     "argv[0]=" + sprintf ("%O", output + ".exe") + ";\n"
 		     "argv[0]=getenv(\"NTDRIVE\")+fixpath(combine_path(getcwd(),argv[0]));\n"
 		     "  int ret=silent_do_cmd(argv);\n"
 		     "  exit(ret);\n"
diff --git a/NT/tools/rntecl b/NT/tools/rntecl
index 5a9cb3f72af07dfe5de115a0ee7de8a3ed0a4f39..942c3829783f4a30cc6e04c844632fb6013c4f2f 100755
--- a/NT/tools/rntecl
+++ b/NT/tools/rntecl
@@ -1,7 +1,7 @@
 #!/usr/local/bin/pike
 // -*- Pike -*-
 
-// $Id: rntecl,v 1.8 2000/08/20 12:49:16 grubba Exp $
+// $Id: rntecl,v 1.9 2000/08/25 17:08:30 mast Exp $
 
 // RNTECL, a front-end to Intel ECL with options similar to GCC
 // Written by Fredrik Hubinette & Henrik Grubbstr�m.
@@ -381,7 +381,7 @@ int main(int argc, string *argv)
 		     "int main(int argc, string *argv) {\n"
 		     "  if (lower_case(getenv(\"CROSSCOMPILING\")||\"no\") != \"no\")\n"
 		     "    exit(1);\n"
-		     "  argv[0]+=\".exe\";\n"
+		     "  argv[0]=" + sprintf ("%O", output + ".exe") + ";\n"
 		     "  argv[0]=getenv(\"NTDRIVE\")+fixpath(combine_path(getcwd(),argv[0]));\n"
 		     "  int ret=silent_do_cmd(argv);\n"
 		     "  exit(ret);\n"