diff --git a/src/mantine-code-highlight/src/CodeHighlightTabs.tsx b/src/mantine-code-highlight/src/CodeHighlightTabs.tsx
index 415c07ee5c4..ae28d4bfb0e 100644
--- a/src/mantine-code-highlight/src/CodeHighlightTabs.tsx
+++ b/src/mantine-code-highlight/src/CodeHighlightTabs.tsx
@@ -179,7 +179,7 @@ export const CodeHighlightTabs = factory<CodeHighlightTabsFactory>((_props, ref)
   const currentCode = nodes[value];
 
   const highlighted = hljs.highlight(currentCode.code.trim(), {
-    language: currentCode.language!,
+    language: currentCode.language || 'plaintext',
   }).value;
 
   const files = nodes.map((node, index) => (