diff --git a/common/gtk-3.0/3.18/gtk-dark.css b/common/gtk-3.0/3.18/gtk-dark.css
index 710ed8b..d55bfec 100644
--- a/common/gtk-3.0/3.18/gtk-dark.css
+++ b/common/gtk-3.0/3.18/gtk-dark.css
@@ -3257,6 +3257,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/gtk-darker.css b/common/gtk-3.0/3.18/gtk-darker.css
index a8671df..4cba945 100644
--- a/common/gtk-3.0/3.18/gtk-darker.css
+++ b/common/gtk-3.0/3.18/gtk-darker.css
@@ -3263,6 +3263,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/gtk-solid-dark.css b/common/gtk-3.0/3.18/gtk-solid-dark.css
index 01e354b..f5340c5 100644
--- a/common/gtk-3.0/3.18/gtk-solid-dark.css
+++ b/common/gtk-3.0/3.18/gtk-solid-dark.css
@@ -3257,6 +3257,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/gtk-solid-darker.css b/common/gtk-3.0/3.18/gtk-solid-darker.css
index dea8abb..2e27795 100644
--- a/common/gtk-3.0/3.18/gtk-solid-darker.css
+++ b/common/gtk-3.0/3.18/gtk-solid-darker.css
@@ -3263,6 +3263,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/gtk-solid.css b/common/gtk-3.0/3.18/gtk-solid.css
index b6d2eda..926f008 100644
--- a/common/gtk-3.0/3.18/gtk-solid.css
+++ b/common/gtk-3.0/3.18/gtk-solid.css
@@ -3267,6 +3267,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/gtk.css b/common/gtk-3.0/3.18/gtk.css
index 6b46532..e730841 100644
--- a/common/gtk-3.0/3.18/gtk.css
+++ b/common/gtk-3.0/3.18/gtk.css
@@ -3267,6 +3267,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   font: initial;
   text-shadow: none;
   icon-shadow: none; }
+  WingpanelWidgetsIndicatorPopover.popover .sidebar {
+    background: none; }
   WingpanelWidgetsIndicatorPopover.popover .menuitem {
     padding: 5px;
     outline-color: transparent;
diff --git a/common/gtk-3.0/3.18/sass/_applications.scss b/common/gtk-3.0/3.18/sass/_applications.scss
index 1cf5936..1bbcde6 100644
--- a/common/gtk-3.0/3.18/sass/_applications.scss
+++ b/common/gtk-3.0/3.18/sass/_applications.scss
@@ -773,6 +773,8 @@ WingpanelWidgetsIndicatorPopover.popover {
   text-shadow: none;
   icon-shadow: none;
 
+  .sidebar { background: none; }
+
   .menuitem {
     padding: 5px;
     outline-color: transparent;