diff --git a/rc/filetype/cmake.kak b/rc/filetype/cmake.kak
index cb5c65dbf..86fda25da 100644
--- a/rc/filetype/cmake.kak
+++ b/rc/filetype/cmake.kak
@@ -25,6 +25,7 @@ add-highlighter shared/cmake/argument region -recurse '\(' '\w+\h*\(\K' '(?=\))'
 add-highlighter shared/cmake/code/ regex '\w+\h*(?=\()' 0:meta
 
 add-highlighter shared/cmake/argument/args default-region regex '\$\{\w+\}' 0:variable
+add-highlighter shared/cmake/argument/comment  region '#' '$' fill comment
 add-highlighter shared/cmake/argument/quoted region '"' '(?<!\\)(\\\\)*"' group
 add-highlighter shared/cmake/argument/raw-quoted region -match-capture '\[(=*)\[' '\](=*)\]' ref cmake/argument/quoted