diff --git a/syntax/quox.vim b/syntax/quox.vim
index 985ef45..193cb1c 100644
--- a/syntax/quox.vim
+++ b/syntax/quox.vim
@@ -60,6 +60,10 @@ syn match   quoxCase /\<case[01#ω]\?\>/ contains=quoxQtySuffix
 syn keyword quoxCase return of
 hi def link quoxCase Conditional
 
+syn match   quoxLet /\<let[01#ω]\?\>/ contains=quoxQtySuffix
+syn keyword quoxLet in
+hi def link quoxLet Conditional
+
 syn match quoxDimension /\%([𝑖𝑗𝑘𝑙]\|\k\)\+/ contained
 hi def link quoxDimension PreProc