diff --git a/Cargo.toml b/Cargo.toml
index d30432b1f0..fe931df70f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -130,6 +130,7 @@ char_lit_as_u8 = "allow"
 collapsible_else_if = "allow"
 collapsible_if = "allow"
 implicit_hasher = "allow"
+map_unwrap_or = "allow"
 match_same_arms = "allow"
 missing_errors_doc = "allow"
 missing_panics_doc = "allow"