diff -crB wmctrl-1.07/main.c wmctrl-1.07.patched/main.c
*** wmctrl-1.07/main.c	2005-01-29 14:31:33.000000000 +1100
--- wmctrl-1.07.patched/main.c	2013-01-19 23:02:30.000000000 +1100
***************
*** 1439,1444 ****
--- 1439,1451 ----
          return NULL;
      }
  
+ #ifdef __x86_64
+     if (ret_format == 32)
+     {
+         ret_format *= 2;
+     }
+ #endif
+ 
      /* null terminate the result to make string handling easier */
      tmp_size = (ret_format / 8) * ret_nitems;
      ret = g_malloc(tmp_size + 1);