diff --git a/src/client.rs b/src/client.rs
index e83ef6a4a..b329121ab 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -1023,7 +1023,7 @@ impl Builder {
     /// stream have been written to the connection, the send buffer capacity
     /// will be freed up again.
     ///
-    /// The default is currently ~400MB, but may change.
+    /// The default is currently ~400KB, but may change.
     ///
     /// # Panics
     ///
diff --git a/src/server.rs b/src/server.rs
index f1f4cf470..bb20adc5d 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -937,7 +937,7 @@ impl Builder {
     /// stream have been written to the connection, the send buffer capacity
     /// will be freed up again.
     ///
-    /// The default is currently ~400MB, but may change.
+    /// The default is currently ~400KB, but may change.
     ///
     /// # Panics
     ///