diff --git a/src/macros.rs b/src/macros.rs
index c47bdf9..2955e4a 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -18,7 +18,7 @@
 ///
 /// Variables or expressions can be interpolated into the JSON literal. Any type
 /// interpolated into an array element or object value must implement Serde's
-/// `Serialize` trait, while any type interpolated into a object key must
+/// `Serialize` trait, while any type interpolated into an object key must
 /// implement `Into<String>`. If the `Serialize` implementation of the
 /// interpolated type decides to fail, or if the interpolated type contains a
 /// map with non-string keys, the `json!` macro will panic.