diff --git a/packages/opencode/src/lsp/language.ts b/packages/opencode/src/lsp/language.ts
index 2b6e0476..8ab7f48d 100644
--- a/packages/opencode/src/lsp/language.ts
+++ b/packages/opencode/src/lsp/language.ts
@@ -52,7 +52,8 @@ export const LANGUAGE_EXTENSIONS: Record<string, string> = {
   ".m": "objective-c",
   ".mm": "objective-cpp",
   ".pl": "perl",
-  ".pm": "perl6",
+  ".pm": "perl",
+  ".pm6": "perl6",
   ".php": "php",
   ".ps1": "powershell",
   ".psm1": "powershell",