diff --git a/src/lib/alsa/HwSetup.cxx b/src/lib/alsa/HwSetup.cxx
index 167a36bd6..b2545954f 100644
--- a/src/lib/alsa/HwSetup.cxx
+++ b/src/lib/alsa/HwSetup.cxx
@@ -20,6 +20,7 @@
 #include "HwSetup.hxx"
 #include "Error.hxx"
 #include "Format.hxx"
+#include "lib/fmt/AudioFormatFormatter.hxx"
 #include "util/ByteOrder.hxx"
 #include "util/Domain.hxx"
 #include "util/RuntimeError.hxx"