diff --git a/src/scanner/error.rs b/src/scanner/error.rs
index f970a13..351487e 100644
--- a/src/scanner/error.rs
+++ b/src/scanner/error.rs
@@ -39,6 +39,9 @@ pub enum ScanError
     /// A flow scalar was invalid for some reason
     InvalidFlowScalar,
 
+    /// A block entry was not expected or allowed
+    InvalidBlockEntry,
+
     /// A character that was not valid for the escape
     /// sequence was encountered
     UnknownEscape,