diff --git a/pandora_console/include/graphs/flot/pandora.flot.js b/pandora_console/include/graphs/flot/pandora.flot.js
index 317be091e7..213cbb1c05 100644
--- a/pandora_console/include/graphs/flot/pandora.flot.js
+++ b/pandora_console/include/graphs/flot/pandora.flot.js
@@ -806,11 +806,7 @@ function pandoraFlotSlicebar(
         tickFormatter: xFormatter,
         color: "",
         tickSize: intervaltick,
-        tickLength: 0,
-        font: {
-          size: font_size + 2,
-          family: font
-        }
+        tickLength: 0
       }
     ],
     yaxes: [
@@ -834,6 +830,10 @@ function pandoraFlotSlicebar(
 
   $.plot($("#" + graph_id), datas, options);
 
+  // Added for correct handle of the font size.
+  // xaxes-yaxes object not handle font-size properly.
+  $(".flot-x-axis .flot-tick-label").css("font-size", font_size);
+
   if (match == null && not_interactive == 0) {
     // Events
     $("#" + graph_id).bind("plothover", function(event, pos, item) {
diff --git a/pandora_console/include/graphs/functions_flot.php b/pandora_console/include/graphs/functions_flot.php
index eabaa8c6b9..247dc911b8 100644
--- a/pandora_console/include/graphs/functions_flot.php
+++ b/pandora_console/include/graphs/functions_flot.php
@@ -778,7 +778,7 @@ function flot_slicesbar_graph(
 
     $datacolor = [];
 
-    $fontsize = $config['font_size'];
+    $fontsize = ((int) $config['font_size'] + 2);
     $fontpath = $config['fontpath'];
 
     $return .= '<div id="extra_'.$graph_id.'" class="slicebar-box-hover-styles invisible" style="font-size:'.$fontsize.'"></div>';