diff --git a/src/Main.elm b/src/Main.elm
index f1d45df..e985bc2 100644
--- a/src/Main.elm
+++ b/src/Main.elm
@@ -326,7 +326,7 @@ humanProblemString p = case p of
 
 humanDeadEndString : DeadEnd -> String
 humanDeadEndString { row, col, problem } =
-    "An parse error occured on line "
+    "A parse error occured on line "
         ++ String.fromInt row
         ++ ": " ++ humanProblemString problem