diff -Naur cups-1.1.20/pdftops/XRef.cxx cups-1.1.20.new/pdftops/XRef.cxx
--- cups-1.1.20/pdftops/XRef.cxx	2005-01-20 12:02:28 +0300
+++ cups-1.1.20.new/pdftops/XRef.cxx	2005-01-20 12:01:41 +0300
@@ -506,6 +506,9 @@
 	} else {
 	  keyLength = 5;
 	}
+	if (keyLength > 16) {
+	  keyLength = 16;
+	}
 	permFlags = permissions.getInt();
 	if (encVersion >= 1 && encVersion <= 2 &&
 	    encRevision >= 2 && encRevision <= 3) {