diff --git a/extensions/markdown-math/notebook/katex.ts b/extensions/markdown-math/notebook/katex.ts
index f6b683ffcb6..ee68b15d61b 100644
--- a/extensions/markdown-math/notebook/katex.ts
+++ b/extensions/markdown-math/notebook/katex.ts
@@ -43,10 +43,12 @@ export async function activate(ctx: RendererContext<void>) {
 	document.head.appendChild(styleTemplate);
 
 	const katex = require('@iktakahiro/markdown-it-katex');
+	const macros = {};
 	markdownItRenderer.extendMarkdownIt((md: markdownIt.MarkdownIt) => {
 		return md.use(katex, {
 			globalGroup: true,
 			enableBareBlocks: true,
+			macros
 		});
 	});
 }
diff --git a/extensions/markdown-math/src/extension.ts b/extensions/markdown-math/src/extension.ts
index 21a96970cbf..542a3ba154d 100644
--- a/extensions/markdown-math/src/extension.ts
+++ b/extensions/markdown-math/src/extension.ts
@@ -24,7 +24,9 @@ export function activate(context: vscode.ExtensionContext) {
 		extendMarkdownIt(md: any) {
 			if (isEnabled()) {
 				const katex = require('@iktakahiro/markdown-it-katex');
-				return md.use(katex, { globalGroup: true });
+				const options = { globalGroup: true, macros: {} };
+				md.core.ruler.push('reset-katex-macros', () => { options.macros = {}; });
+				return md.use(katex, options);
 			}
 			return md;
 		}