1 files changed, 2 insertions, 2 deletions
diff --git a/app/assets/javascripts/vue_shared/components/source_viewer/source_viewer.vue b/app/assets/javascripts/vue_shared/components/source_viewer/source_viewer.vue
index f471db24889..9c6c12eac7d 100644
--- a/app/assets/javascripts/vue_shared/components/source_viewer/source_viewer.vue
+++ b/app/assets/javascripts/vue_shared/components/source_viewer/source_viewer.vue
@@ -42,7 +42,7 @@ export default {
     return {
       languageDefinition: null,
       content: this.blob.rawTextBlob,
-      language: ROUGE_TO_HLJS_LANGUAGE_MAP[this.blob.language],
+      language: ROUGE_TO_HLJS_LANGUAGE_MAP[this.blob.language?.toLowerCase()],
       hljs: null,
       firstChunk: null,
       chunks: {},
@@ -62,7 +62,7 @@ export default {
       const supportedLanguages = Object.keys(languageLoader);
       return (
         !supportedLanguages.includes(this.language) &&
-        !supportedLanguages.includes(this.blob.language)
+        !supportedLanguages.includes(this.blob.language?.toLowerCase())
       );
     },
   },