diff --git a/src/pcm/PcmDop.cxx b/src/pcm/PcmDop.cxx
index 8fad889c2..f4f1e6c8d 100644
--- a/src/pcm/PcmDop.cxx
+++ b/src/pcm/PcmDop.cxx
@@ -27,21 +27,21 @@
 
 constexpr
 static inline uint32_t
-pcm_two_dsd_to_dop_marker1(uint8_t a, uint8_t b)
+pcm_two_dsd_to_dop_marker1(uint8_t a, uint8_t b) noexcept
 {
 	return 0xff050000 | (a << 8) | b;
 }
 
 constexpr
 static inline uint32_t
-pcm_two_dsd_to_dop_marker2(uint8_t a, uint8_t b)
+pcm_two_dsd_to_dop_marker2(uint8_t a, uint8_t b) noexcept
 {
 	return 0xfffa0000 | (a << 8) | b;
 }
 
 ConstBuffer<uint32_t>
 pcm_dsd_to_dop(PcmBuffer &buffer, unsigned channels,
-	       ConstBuffer<uint8_t> _src)
+	       ConstBuffer<uint8_t> _src) noexcept
 {
 	assert(audio_valid_channel_count(channels));
 	assert(_src.size % channels == 0);
diff --git a/src/pcm/PcmDop.hxx b/src/pcm/PcmDop.hxx
index 9e8cd8325..7b868c737 100644
--- a/src/pcm/PcmDop.hxx
+++ b/src/pcm/PcmDop.hxx
@@ -34,6 +34,6 @@ template<typename T> struct ConstBuffer;
  */
 ConstBuffer<uint32_t>
 pcm_dsd_to_dop(PcmBuffer &buffer, unsigned channels,
-	       ConstBuffer<uint8_t> src);
+	       ConstBuffer<uint8_t> src) noexcept;
 
 #endif