--- pdftk/pdftk.cc	2009-04-09 18:07:27.000000000 +0100
+++ pdftk/pdftk.cc	2009-04-09 18:09:20.000000000 +0100
@@ -2669,6 +2669,44 @@
 			 strcmp( argv[ii], "-h" )== 0 );
 	}
 
+  {
+    // Set up CLASSPATH so that we can find property files in
+    // itext.jar.  Do this the official way, calling build-classpath.
+
+    char new_classpath[4096];
+    char itext_classpath[1024];
+    char *environ_classpath = getenv ("CLASSPATH");
+
+    FILE *p = popen ("/usr/bin/build-classpath itext bcprov bcmail bctsp", "r");
+    if (!p)
+      {
+        perror ("Can't popen /usr/bin/build-classpath itext bcprov bcmail bctsp");
+        exit (1);
+      }
+
+    char *s = fgets(itext_classpath, sizeof itext_classpath, p);
+    if (!s)
+      {
+        perror ("Can't get ouput from /usr/bin/build-classpath itext bcprov bcmail bctsp");
+        exit (1);
+      }
+
+    char *nl = strchr (itext_classpath, '\n');
+    if (nl)
+      *nl = 0;
+
+    pclose (p);
+
+    strcpy (new_classpath, "CLASSPATH=");
+    strncat (new_classpath, itext_classpath, sizeof new_classpath);
+    if (environ_classpath)
+      {
+        strncat (new_classpath, ":", sizeof new_classpath);
+        strncat (new_classpath, environ_classpath, sizeof new_classpath);
+      }
+    putenv (new_classpath);
+  }
+
 	if( help_b ) {
 		describe_full();
 	}