diff --git a/src/sysprof/sysprof-samples-section.c b/src/sysprof/sysprof-samples-section.c
index 10160797..a20c68a5 100644
--- a/src/sysprof/sysprof-samples-section.c
+++ b/src/sysprof/sysprof-samples-section.c
@@ -36,6 +36,13 @@ struct _SysprofSamplesSection
 
 G_DEFINE_FINAL_TYPE (SysprofSamplesSection, sysprof_samples_section, SYSPROF_TYPE_SECTION)
 
+static char *
+format_number (gpointer unused,
+               guint    number)
+{
+  return g_strdup_printf ("%'u", number);
+}
+
 static void
 sysprof_samples_section_dispose (GObject *object)
 {
@@ -56,6 +63,7 @@ sysprof_samples_section_class_init (SysprofSamplesSectionClass *klass)
 
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/sysprof/sysprof-samples-section.ui");
   gtk_widget_class_bind_template_child (widget_class, SysprofSamplesSection, callgraph_view);
+  gtk_widget_class_bind_template_callback (widget_class, format_number);
 
   g_type_ensure (SYSPROF_TYPE_CHART);
   g_type_ensure (SYSPROF_TYPE_XY_SERIES);
diff --git a/src/sysprof/sysprof-samples-section.ui b/src/sysprof/sysprof-samples-section.ui
index f5693b70..76e014bd 100644
--- a/src/sysprof/sysprof-samples-section.ui
+++ b/src/sysprof/sysprof-samples-section.ui
@@ -2,6 +2,17 @@
 <interface>
   <template class="SysprofSamplesSection" parent="SysprofSection">
     <property name="title" translatable="yes">Time Profiler</property>
+    <binding name="indicator">
+      <closure type="gchararray" function="format_number">
+        <lookup name="n-items" type="SysprofDocumentBitsetIndex">
+          <lookup name="samples" type="SysprofDocument">
+            <lookup name="document" type="SysprofSession">
+              <lookup name="session">SysprofSamplesSection</lookup>
+            </lookup>
+          </lookup>
+        </lookup>
+      </closure>
+    </binding>
     <child>
       <object class="GtkBox">
         <property name="orientation">vertical</property>