diff --git a/Documentation/SBV/Examples/Puzzles/AOC_2021_24.hs b/Documentation/SBV/Examples/Puzzles/AOC_2021_24.hs
index 4598efde..cefc6ac9 100644
--- a/Documentation/SBV/Examples/Puzzles/AOC_2021_24.hs
+++ b/Documentation/SBV/Examples/Puzzles/AOC_2021_24.hs
@@ -24,7 +24,7 @@
 {-# LANGUAGE NamedFieldPuns   #-}
 {-# LANGUAGE NegativeLiterals #-}
 
-#if __GLASGOW_HASKELL__ >= 914
+#if __GLASGOW_HASKELL__ >= 913
 {-# OPTIONS_GHC -Wall -Werror -Wno-incomplete-record-selectors #-}
 #else
 {-# OPTIONS_GHC -Wall -Werror #-}