diff --git a/extension.json b/extension.json
index 42468e966f..18b368b16a 100644
--- a/extension.json
+++ b/extension.json
@@ -1525,7 +1525,7 @@
 			],
 			"styles": [
 				"modules/ve-mw/preinit/styles/ve.init.MWVESwitchConfirmDialog.css",
-				"modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.css"
+				"modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.less"
 			],
 			"skinStyles": {
 				"default": [
diff --git a/modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.css b/modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.less
similarity index 58%
rename from modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.css
rename to modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.less
index 2f2f42b4b4..3c22ebd300 100644
--- a/modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.css
+++ b/modules/ve-mw/preinit/styles/ve.init.MWVESwitchPopupWidget.less
@@ -8,12 +8,12 @@
 .ve-init-mw-switchPopupWidget {
 	white-space: normal;
 	z-index: 4;
-}
 
-.ve-init-mw-switchPopupWidget .oo-ui-popupWidget-anchor {
-	margin-left: 1.25em;
-}
+	.oo-ui-popupWidget-anchor {
+		margin-left: 1.25em;
+	}
 
-.ve-init-mw-switchPopupWidget .oo-ui-popupWidget-head {
-	font-weight: bold;
+	.oo-ui-popupWidget-head {
+		font-weight: bold;
+	}
 }