diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/mermaid.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/mermaid.js
index b4ae5d52d..6de2a1d1e 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/mermaid.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/mermaid.js
@@ -44,7 +44,7 @@ RED.editor.mermaid = (function () {
 
             nodes.forEach(async node => {
                 if (!node.getAttribute('mermaid-processed')) {
-                    const mermaidContent = node.innerText
+                    const mermaidContent = atob($(node).data('c64'))
                     node.setAttribute('mermaid-processed', true)
                     try {
                         const { svg } = await mermaid.render('mermaid-render-'+Date.now()+'-'+(diagramIds++), mermaidContent);