diff --git a/packages/compass-schema/src/modules/shared.js b/packages/compass-schema/src/modules/shared.js
index dae107a65c0..504e0959f15 100644
--- a/packages/compass-schema/src/modules/shared.js
+++ b/packages/compass-schema/src/modules/shared.js
@@ -43,6 +43,7 @@ const minicharts_d3fns_shared = {
   },
 
   tooltip: function (label, count) {
+    label = label.replaceAll(/</g, '&lt;').replaceAll(/>/g, '&gt;');
     return `
       <div class="tooltip-wrapper">
         <div class="tooltip-label">${label}</div>