diff --git a/packages/turndown-plugin-gfm/src/tables.js b/packages/turndown-plugin-gfm/src/tables.js
index 1492211f5b..c5469d4f22 100644
--- a/packages/turndown-plugin-gfm/src/tables.js
+++ b/packages/turndown-plugin-gfm/src/tables.js
@@ -179,7 +179,7 @@ const nodeContains = (node, types) => {
 
   for (let i = 0; i < node.childNodes.length; i++) {
     const child = node.childNodes[i];
-    if (types === 'code' && isCodeBlock_(child)) return true;
+    if (types === 'code' && isCodeBlock_ && isCodeBlock_(child)) return true;
     if (types.includes(child.nodeName)) return true;
     if (nodeContains(child, types)) return true;
   }