diff --git a/extensions/markdown-language-features/media/markdown.css b/extensions/markdown-language-features/media/markdown.css
index dc12cfca001..273dc40f917 100644
--- a/extensions/markdown-language-features/media/markdown.css
+++ b/extensions/markdown-language-features/media/markdown.css
@@ -186,6 +186,7 @@ pre.hljs code > div {
 
 pre code {
 	color: var(--vscode-editor-foreground);
+	tab-size: 4;
 }