diff --git a/ChangeLog b/ChangeLog
index 15488c852..b6c16dad0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -54,6 +54,8 @@ Bugs
  + Fixed bug #1056, where CmdSummary did not print abstract parents.
  + Fixed bug #1059, where CmdEdit was running garbage collection.
  + Fixed bug #1060, where an error was not thrown correctly.
+ + Fixed bug #1063, so that numeric UDA fields are now sortable (thanks to Max
+   Muller).
  + Fixed bug #1065, where CmdShow issued messages in incorrect situations.
  + Partially fixed #1083, which showed 'task 0 ...' when modifying a non-
    pending task (thanks to Aikido Guy).
diff --git a/src/sort.cpp b/src/sort.cpp
index babf7b055..3829bb78a 100644
--- a/src/sort.cpp
+++ b/src/sort.cpp
@@ -30,6 +30,7 @@
 #include <algorithm>
 #include <vector>
 #include <string>
+#include <stdlib.h>
 #include <Context.h>
 #include <Duration.h>
 #include <Task.h>
@@ -231,8 +232,8 @@ static bool sort_compare (int left, int right)
       std::string type = column->type ();
       if (type == "numeric")
       {
-        left_real  = (*global_data)[left].urgency ();
-        right_real = (*global_data)[right].urgency ();
+        const float left_real  = strtof (((*global_data)[left].get_ref  (field)).c_str (), NULL);
+        const float right_real = strtof (((*global_data)[right].get_ref (field)).c_str (), NULL);
 
         if (left_real == right_real)
           continue;
diff --git a/test/bug.1063.t b/test/bug.1063.t
new file mode 100755
index 000000000..a94c6f0f2
--- /dev/null
+++ b/test/bug.1063.t
@@ -0,0 +1,77 @@
+#! /usr/bin/env perl
+################################################################################
+## taskwarrior - a command line task list manager.
+##
+## Copyright 2006-2012, Paul Beckingham, Federico Hernandez.
+##
+## Permission is hereby granted, free of charge, to any person obtaining a copy
+## of this software and associated documentation files (the "Software"), to deal
+## in the Software without restriction, including without limitation the rights
+## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+## copies of the Software, and to permit persons to whom the Software is
+## furnished to do so, subject to the following conditions:
+##
+## The above copyright notice and this permission notice shall be included
+## in all copies or substantial portions of the Software.
+##
+## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+## THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+## SOFTWARE.
+##
+## http://www.opensource.org/licenses/mit-license.php
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 8;
+use File::Basename;
+
+my $ut = basename ($0);
+my $rc = $ut . '.rc';
+
+# Create the rc file.
+if (open my $fh, '>', $rc)
+{
+  print $fh "data.location=.\n",
+            "confirmation=off\n",
+            "uda.foo.type=numeric\n",
+            "uda.foo.label=Foo\n",
+            "report.bar.columns=foo,description\n",
+            "report.bar.description=Bar\n",
+            "report.bar.labels=Foo,Desc\n",
+            "report.bar.sort=foo-\n";
+  close $fh;
+  ok (-r $rc, "$ut: Created $rc");
+}
+
+# Bug 1063 - Numeric UDA fields are not sortable.
+qx{../src/task rc:$rc add four  foo:4 2>&1};
+ok ($? == 0, "$ut: add four");
+qx{../src/task rc:$rc add one   foo:1 2>&1};
+ok ($? == 0, "$ut: add one");
+qx{../src/task rc:$rc add three foo:3 2>&1};
+ok ($? == 0, "$ut: add three");
+qx{../src/task rc:$rc add two   foo:2 2>&1};
+ok ($? == 0, "$ut: add two");
+
+my $output = qx{../src/task rc:$rc bar 2>&1};
+like ($output, qr/4.+3.+2.+1/ms, "$ut: Default descending sort correct");
+
+$output = qx{../src/task rc:$rc bar rc.report.bar.sort=foo+ 2>&1};
+like ($output, qr/1.+2.+3.+4/ms, "$ut: Default ascending sort correct");
+
+## Cleanup.
+unlink qw(pending.data completed.data undo.data backlog.data synch.key), $rc;
+ok (! -r 'pending.data'   &&
+    ! -r 'completed.data' &&
+    ! -r 'undo.data'      &&
+    ! -r 'backlog.data'   &&
+    ! -r 'synch.key'      &&
+    ! -r $rc, "$ut: Cleanup");
+
+exit 0;