diff --git a/jpegxl-rs/src/encode.rs b/jpegxl-rs/src/encode.rs
index c140e58..86c306b 100644
--- a/jpegxl-rs/src/encode.rs
+++ b/jpegxl-rs/src/encode.rs
@@ -110,7 +110,7 @@ pub struct JxlEncoder<'prl, 'mm> {
     /// Set initial output buffer size in bytes.
     /// Anything less than 32 bytes will be rounded up to 32 bytes.
     ///
-    /// Default: 512 KiB
+    /// Default: 512 MiB
     pub init_buffer_size: usize,
 
     /// Set color encoding