diff --git a/src/Stan/Pattern/Type.hs b/src/Stan/Pattern/Type.hs
index defd595..c46bafc 100644
--- a/src/Stan/Pattern/Type.hs
+++ b/src/Stan/Pattern/Type.hs
@@ -1,4 +1,4 @@
-{-# LANGuAGE CPP #-}
+{-# LANGUAGE CPP #-}
 
 {- HLINT ignore "Avoid lambda using `infix`" -}