diff --git a/gui.h b/gui.h
index 321c4c4..cae0c64 100644
--- a/gui.h
+++ b/gui.h
@@ -115,7 +115,7 @@ G_MODULE_EXPORT void cb_histogram_show_window (GtkWidget *widget, gpointer data)
 //
 // menu elements
 G_MODULE_EXPORT void cb_menu_set_rgbenc (GtkCheckMenuItem *checkmenuitem,  gpointer user_data);
-
+G_MODULE_EXPORT void cb_menu_set_histlog (GtkCheckMenuItem *checkmenuitem,  gpointer user_data);
 
 #ifdef __cplusplus
 }
diff --git a/histogram.cc b/histogram.cc
index 1aa1b7e..fa52016 100644
--- a/histogram.cc
+++ b/histogram.cc
@@ -243,3 +243,10 @@ void cb_histogram_show_window (GtkWidget *widget, gpointer data) {
 };
 
 
+void cb_menu_set_histlog (GtkCheckMenuItem *checkmenuitem,  gpointer user_data) {
+	config.SetHistogramLog(gtk_check_menu_item_get_active(checkmenuitem) == TRUE);
+}
+
+
+
+
diff --git a/simpleskycam.ui b/simpleskycam.ui
index 6da08d5..1af94f5 100644
--- a/simpleskycam.ui
+++ b/simpleskycam.ui
@@ -598,6 +598,7 @@ Image Data</property>
                         <property name="can-focus">False</property>
                         <property name="label" translatable="yes">_Log-Histogram</property>
                         <property name="use-underline">True</property>
+                        <signal name="toggled" handler="cb_menu_set_histlog" swapped="no"/>
                       </object>
                     </child>
                   </object>