diff -ur xsel-1.2.0/xsel.c xsel-1.2.0.new/xsel.c
--- xsel-1.2.0/xsel.c	2008-02-12 05:50:18.000000000 +0100
+++ xsel-1.2.0.new/xsel.c	2011-03-23 16:38:38.942688972 +0100
@@ -68,7 +68,7 @@
  * NB. We do not currently serve COMPOUND_TEXT; we can retrieve it but do not
  * perform charset conversion.
  */
-#define MAX_NUM_TARGETS 8
+#define MAX_NUM_TARGETS 9
 static int NUM_TARGETS;
 static Atom supported_targets[MAX_NUM_TARGETS];
 
@@ -2097,6 +2097,11 @@
   supported_targets[s++] = XA_STRING;
   NUM_TARGETS++;
 
+  if (NUM_TARGETS > MAX_NUM_TARGETS) {
+    exit_err ("internal error num-targets (%d) > max-num-targets (%d)\n",
+              NUM_TARGETS, MAX_NUM_TARGETS);
+  }
+
   /* Get the COMPOUND_TEXT atom.
    * NB. We do not currently serve COMPOUND_TEXT; we can retrieve it but
    * do not perform charset conversion.