diff --git a/apps/client/src/widgets/type_widgets/helpers/SplitEditor.css b/apps/client/src/widgets/type_widgets/helpers/SplitEditor.css
index 7ea0a003c..09821931c 100644
--- a/apps/client/src/widgets/type_widgets/helpers/SplitEditor.css
+++ b/apps/client/src/widgets/type_widgets/helpers/SplitEditor.css
@@ -43,7 +43,7 @@
 
 /* Horizontal layout */
 
-.note-detail-split.split-horizontal > .note-detail-split-preview-col {
+.note-detail-split.split-horizontal:not(.split-read-only) > .note-detail-split-preview-col {
     border-inline-start: 1px solid var(--main-border-color);
 }
 
@@ -93,4 +93,4 @@
     height: 100%;
     max-width: 100%;
 }
-/* #endregion */
\ No newline at end of file
+/* #endregion */