diff --git a/addons/web/static/src/js/formats.js b/addons/web/static/src/js/formats.js
index 9432b02826f..851b60af229 100644
--- a/addons/web/static/src/js/formats.js
+++ b/addons/web/static/src/js/formats.js
@@ -166,9 +166,13 @@ instance.web.format_value = function (value, descriptor, value_if_empty) {
                 value = Math.abs(value);
                 pattern = '-' + pattern;
             }
-            return _.str.sprintf(pattern,
-                    Math.floor(value),
-                    Math.round((value % 1) * 60));
+            var hour = Math.floor(value);
+            var min = Math.round((value % 1) * 60);
+            if (min == 60){
+                min = 0;
+                hour = hour + 1;
+            }
+            return _.str.sprintf(pattern, hour, min);
         case 'many2one':
             // name_get value format
             return value[1] ? value[1].split("\n")[0] : value[1];
diff --git a/addons/web/static/test/formats.js b/addons/web/static/test/formats.js
index 4536501d71d..ac602e4b693 100644
--- a/addons/web/static/test/formats.js
+++ b/addons/web/static/test/formats.js
@@ -68,6 +68,12 @@ openerp.testing.section('web-formats', {
         strictEqual(
             instance.web.format_value(-0.0085, {type:'float', widget:'float_time'}),
             '-00:01');
+        strictEqual(
+            instance.web.format_value(4.9999, {type:'float', widget:'float_time'}),
+            '05:00');
+        strictEqual(
+            instance.web.format_value(-6.9999, {type:'float', widget:'float_time'}),
+            '-07:00');
     });
     test("format_float", function (instance) {
         var fl = 12.1234;