diff --git a/ChangeLog b/ChangeLog
index 52da3c3a6..07f3fb62c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-11-28  Colin Watson  <cjwatson@ubuntu.com>
+
+	* util/getroot.c (find_root_device_from_libzfs): Use xasprintf.
+
 2011-11-27  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/fs/zfs/zfs.c (recovery): Fix spelling.
diff --git a/util/getroot.c b/util/getroot.c
index cc3fdf77d..05bee4964 100644
--- a/util/getroot.c
+++ b/util/getroot.c
@@ -355,7 +355,7 @@ find_root_device_from_libzfs (const char *dir)
     char name[PATH_MAX], state[256], readlen[256], writelen[256], cksum[256], notes[256];
     unsigned int dummy;
 
-    asprintf (&cmd, "zpool status %s", poolname);
+    cmd = xasprintf ("zpool status %s", poolname);
     fp = popen (cmd, "r");
     free (cmd);
 
@@ -392,7 +392,7 @@ find_root_device_from_libzfs (const char *dir)
 	
 	free (line);
       }
-    asprintf (&device, "/dev/%s", name);
+    device = xasprintf ("/dev/%s", name);
 
  fail:
     pclose (fp);