diff -up jwhois-4.0/src/jwhois.c.orig jwhois-4.0/src/jwhois.c
--- jwhois-4.0/src/jwhois.c.orig	2007-06-26 08:59:35.000000000 +0200
+++ jwhois-4.0/src/jwhois.c	2011-05-24 12:29:37.398892451 +0200
@@ -98,7 +98,7 @@ main(int argc, char **argv)
 
   /* Parse remaining arguments and place them into the wq
      structure. */
-  while (optind < argc)
+  while (optind < argc-1)
     {
       count += strlen(argv[optind])+1;
       if (!qstring)
@@ -116,19 +116,25 @@ main(int argc, char **argv)
       strcat(qstring, " ");
       optind++;
     }
-  qstring[strlen(qstring)-1] = '\0';
 #ifdef LIBIDN
-  rc = idna_to_ascii_lz(qstring, &idn, 0);
+  rc = idna_to_ascii_lz(argv[optind], &idn, 0);
   if (rc != IDNA_SUCCESS)
     {
-      printf("[IDN encoding of '%s' failed with error code %d]\n", qstring, rc);
+      printf("[IDN encoding of '%s' failed with error code %d]\n", argv[optind], rc);
       exit(1);
     }
-  wq.query = strdup(idn);
+  qstring = realloc(qstring, count+strlen(idn)+1);
+  memcpy(qstring+count,
+         idn,
+         strlen(idn)+1);
   free(idn);
 #else
-  wq.query = qstring;
+  qstring = realloc(qstring, count+strlen(argv[optind])+1);
+  memcpy(qstring+count,
+         argv[optind],
+         strlen(argv[optind])+1);
 #endif
+  wq.query = qstring;
 
   if (ghost)
     {