diff --git a/src/expr.rs b/src/expr.rs
index a2e47d31b4..67ccc7773e 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -904,7 +904,7 @@ impl Expr {
     #[cfg(feature = "parsing")]
     #[cfg_attr(docsrs, doc(cfg(feature = "parsing")))]
     pub fn peek(input: ParseStream) -> bool {
-        input.peek(Ident::peek_any) // value name or keyword
+        input.peek(Ident::peek_any) && !input.peek(Token![as]) // value name or keyword
             || input.peek(token::Paren) // tuple
             || input.peek(token::Bracket) // array
             || input.peek(token::Brace) // block