diff --git a/vim/syntax/fart.vim b/vim/syntax/fart.vim
index 7d2e494..46c5dbd 100644
--- a/vim/syntax/fart.vim
+++ b/vim/syntax/fart.vim
@@ -10,7 +10,7 @@ endif
 
 syn case match
 
-syn keyword fartKeywords ambient color define diffuse height look_at material max_depth multisample options position radius reflectance rotate scale shininess size specular translate transparency union up vfov width
+syn keyword fartKeywords ambient color define diffuse exposure height look_at material max_depth multisample options position radius reflectance rotate scale shininess size specular translate transparency union up vfov width
 syn keyword fartObjects box camera cyl intersect light plane scene sphere subtract union
 syn match fartNumber "\(^\|\W\)\@<=[+-]\=\(\d\+\)\=\.\=\d\+\([eE][+-]\=\d\+\)\="