diff --git a/src/prolog/ast.rs b/src/prolog/ast.rs
index c2b3d6c6..1128a800 100644
--- a/src/prolog/ast.rs
+++ b/src/prolog/ast.rs
@@ -466,7 +466,6 @@ pub enum ParserError
     BuiltInArityMismatch(&'static str),
     UnexpectedChar(char),
     UnexpectedEOF,
-    FailedMatch(String),
     IO(IOError),
     ExpectedRel,
     InadmissibleFact,
diff --git a/src/prolog/parser b/src/prolog/parser
index c413cc46..914f216a 160000
--- a/src/prolog/parser
+++ b/src/prolog/parser
@@ -1 +1 @@
-Subproject commit c413cc4651052990a518b9f358c21add95556ddd
+Subproject commit 914f216add609f7edde947e6684325dd6d5a7c4c