diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 795fbe1a..a3c3e4a6 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -626,6 +626,9 @@ INI:
   - .prefs
   - .properties
   primary_extension: .ini
+  
+Inno Setup:
+  primary_extension: .iss
 
 IRC log:
   lexer: IRC logs