diff --git a/rc/filetype/fennel.kak b/rc/filetype/fennel.kak
index e6d604fe..91368cc5 100644
--- a/rc/filetype/fennel.kak
+++ b/rc/filetype/fennel.kak
@@ -39,7 +39,7 @@ evaluate-commands %sh{
     # Grammar
     keywords="require-macros eval-compiler doc lua hashfn macro macros import-macros pick-args pick-values macroexpand macrodebug
               do values if when each for fn lambda λ partial while set global var local let tset set-forcibly! doto match or and
-              not not= collect icollect rshift lshift bor band bnot bxor with-open"
+              not not= collect icollect accumulate rshift lshift bor band bnot bxor with-open"
     re_keywords='\\$ \\$1 \\$2 \\$3 \\$4 \\$5 \\$6 \\$7 \\$8 \\$9 \\$\\.\\.\\.'
     builtins="_G _VERSION arg assert bit32 collectgarbage coroutine debug
               dofile error getfenv getmetatable io ipairs length load