diff --git a/src/request/parser.rs b/src/request/parser.rs
index 2d528ca..d96eef7 100644
--- a/src/request/parser.rs
+++ b/src/request/parser.rs
@@ -12,6 +12,7 @@ impl Request<String> {
         let mut parser = Rfc5321Parser::new(bytes);
         let command = parser.hashed_value()?;
         if !parser.stop_char.is_ascii_whitespace() {
+            parser.seek_lf()?;
             return Err(Error::UnknownCommand);
         }