diff --git a/src/framework/theme/components/cdk/overlay/_overlay.theme.scss b/src/framework/theme/components/cdk/overlay/_overlay.theme.scss
index 3967308bd9..eb21c0a1fd 100644
--- a/src/framework/theme/components/cdk/overlay/_overlay.theme.scss
+++ b/src/framework/theme/components/cdk/overlay/_overlay.theme.scss
@@ -1,4 +1,4 @@
-@import '~@angular/cdk/overlay-prebuilt.css';
+@import '~@angular/cdk/overlay-prebuilt';
 
 @mixin nb-overlay-theme {
   .overlay-backdrop {