diff --git a/public/less/generics.less b/public/less/generics.less
index 16528024f7..265007af55 100644
--- a/public/less/generics.less
+++ b/public/less/generics.less
@@ -15,11 +15,15 @@
 
 .define-if-not-set();
 
-.category-list {
-	padding: 0;
+#move_thread_modal .category-list {
 	height: 500px;
 	overflow-y: auto;
 	overflow-x: hidden;
+}
+
+.category-list {
+	padding: 0;
+
 	li {
 		.inline-block;
 		.pointer;