diff --git a/UI/data/themes/Acri.qss b/UI/data/themes/Acri.qss
index 3d636f220..da25048b8 100644
--- a/UI/data/themes/Acri.qss
+++ b/UI/data/themes/Acri.qss
@@ -155,8 +155,8 @@ QListWidget QLineEdit {
 
 /* Dock stuff */
 QDockWidget {
-	titlebar-close-icon: url('./Dark/Close.svg');
-	titlebar-normal-icon: url('./Dark/Popout.svg');
+	titlebar-close-icon: url('./Dark/close.svg');
+	titlebar-normal-icon: url('./Dark/popout.svg');
 }
 
 QDockWidget {
diff --git a/UI/data/themes/Dark.qss b/UI/data/themes/Dark.qss
index 7feb6a0c4..cad2422e2 100644
--- a/UI/data/themes/Dark.qss
+++ b/UI/data/themes/Dark.qss
@@ -120,8 +120,8 @@ SourceTree QLineEdit {
 /* Dock Widget */
 
 QDockWidget {
-	titlebar-close-icon: url('./Dark/Close.svg');
-	titlebar-normal-icon: url('./Dark/Popout.svg');
+	titlebar-close-icon: url('./Dark/close.svg');
+	titlebar-normal-icon: url('./Dark/popout.svg');
 }
 
 QDockWidget::title {
diff --git a/UI/data/themes/Rachni.qss b/UI/data/themes/Rachni.qss
index 253061bf6..2e9e16905 100644
--- a/UI/data/themes/Rachni.qss
+++ b/UI/data/themes/Rachni.qss
@@ -189,8 +189,8 @@ QListWidget::item:hover:!active {
 /***********************/
 
 QDockWidget {
-	titlebar-close-icon: url('./Dark/Close.svg');
-	titlebar-normal-icon: url('./Dark/Popout.svg');
+	titlebar-close-icon: url('./Dark/close.svg');
+	titlebar-normal-icon: url('./Dark/popout.svg');
 }
 
 QDockWidget {