diff --git a/serde/src/ser/impls.rs b/serde/src/ser/impls.rs
index c10cbe52..b127773e 100644
--- a/serde/src/ser/impls.rs
+++ b/serde/src/ser/impls.rs
@@ -303,7 +303,7 @@ macro_rules! map_impl {
             where
                 S: Serializer,
             {
-                serializer.collect_seq(self)
+                serializer.collect_map(self)
             }
         }
     }