diff --git a/src/encoder/ToOutputStream.cxx b/src/encoder/ToOutputStream.cxx
index f87453339..eec2a7b5b 100644
--- a/src/encoder/ToOutputStream.cxx
+++ b/src/encoder/ToOutputStream.cxx
@@ -12,7 +12,7 @@ EncoderToOutputStream(OutputStream &os, Encoder &encoder)
 		/* read from the encoder */
 
 		std::byte buffer[32768];
-		const auto r = encoder.Read(std::span{buffer});
+		const auto r = encoder.Read(buffer);
 		if (r.empty())
 			return;