diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c1598bff..5c6693c3 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -2490,6 +2490,16 @@ Perl6:
   tm_scope: source.perl.6
   ace_mode: perl
 
+PicoLisp:
+  type: programming
+  extensions:
+  - .l
+  interpreters:
+  - picolisp
+  - pil
+  tm_scope: source.lisp
+  ace_mode: lisp
+
 PigLatin:
   type: programming
   color: "#fcd7de"