diff --git a/src/components/sidebar/Sidebar.vue b/src/components/sidebar/Sidebar.vue
index 29696e58e9..e927a43ab7 100755
--- a/src/components/sidebar/Sidebar.vue
+++ b/src/components/sidebar/Sidebar.vue
@@ -166,7 +166,7 @@ export default {
     transition-property: background-color;
 }
 
-.p-sidebar-mask-leave.p-component-overlay {
+.p-sidebar-mask.p-sidebar-mask-leave.p-component-overlay {
     background-color: transparent;
 }
 
@@ -275,4 +275,4 @@ export default {
         width: 20rem;
     }
 }
-</style>
\ No newline at end of file
+</style>