diff --git a/src/types.rs b/src/types.rs
index 8d3dbd1..23ae328 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -146,6 +146,7 @@ impl FromVecExpression<Book> for Book {
             },
             year: match &value[10] {
                 sql_parse::Expression::Integer(v) => v.0,
+                sql_parse::Expression::Unary { .. } => 0,
                 _ => panic!("Book.year"),
             },
         }