diff --git a/css/burichan.css b/css/burichan.css
index 3fd787105..6d3958aea 100644
--- a/css/burichan.css
+++ b/css/burichan.css
@@ -56,6 +56,6 @@
 :root.burichan .focused.entry {
   background: rgba(255, 255, 255, .33);
 }
-:root.yotsuba-b .thumb > .menu-button > i {
+:root.burichan .thumb > .menu-button > i {
   background: #EEF2FF;
 }
diff --git a/css/futaba.css b/css/futaba.css
index c9588ccf4..9eccd158a 100644
--- a/css/futaba.css
+++ b/css/futaba.css
@@ -56,6 +56,6 @@
 :root.futaba .focused.entry {
   background: rgba(255, 255, 255, .33);
 }
-:root.yotsuba-b .thumb > .menu-button > i {
+:root.futaba .thumb > .menu-button > i {
   background: #FFE;
 }
diff --git a/css/photon.css b/css/photon.css
index 1d95e6a63..1f1be5401 100644
--- a/css/photon.css
+++ b/css/photon.css
@@ -56,6 +56,6 @@
 :root.photon .focused.entry {
   background: rgba(255, 255, 255, .33);
 }
-:root.yotsuba-b .thumb > .menu-button > i {
+:root.photon .thumb > .menu-button > i {
   background: #EEE;
 }
diff --git a/css/tomorrow.css b/css/tomorrow.css
index 2805b062c..453c18589 100644
--- a/css/tomorrow.css
+++ b/css/tomorrow.css
@@ -56,6 +56,6 @@
 :root.tomorrow .focused.entry {
   background: rgba(0, 0, 0, .33);
 }
-:root.yotsuba-b .thumb > .menu-button > i {
+:root.tomorrow .thumb > .menu-button > i {
   background: #1D1F21;
 }
diff --git a/css/yotsuba.css b/css/yotsuba.css
index b78fa0cb6..80731f3f1 100644
--- a/css/yotsuba.css
+++ b/css/yotsuba.css
@@ -56,6 +56,6 @@
 :root.yotsuba .focused.entry {
   background: rgba(255, 255, 255, .33);
 }
-:root.yotsuba-b .thumb > .menu-button > i {
+:root.yotsuba .thumb > .menu-button > i {
   background: #FFE;
 }