diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index d8f10026..53be5d82 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -820,6 +820,8 @@ Myghty:
 
 NSIS:
   primary_extension: .nsi
+  extensions:
+  - .nsh
 
 Nemerle:
   type: programming