diff --git a/src/encoder/plugins/WaveEncoderPlugin.cxx b/src/encoder/plugins/WaveEncoderPlugin.cxx
index 53b22da54..b224b11e9 100644
--- a/src/encoder/plugins/WaveEncoderPlugin.cxx
+++ b/src/encoder/plugins/WaveEncoderPlugin.cxx
@@ -63,7 +63,7 @@ struct WaveHeader {
 
 static_assert(sizeof(WaveHeader) == 44);
 
-static constexpr WaveHeader
+static WaveHeader
 MakeWaveHeader(int channels, int bits,
 	       int freq, int block_size) noexcept
 {