diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 481076a4..a4f27b25 100755
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -3421,6 +3421,9 @@ Scheme:
   - guile
   - bigloo
   - chicken
+  - csi
+  - gosh
+  - r6rs
   ace_mode: scheme
 
 Scilab: