diff --git a/src/sound/CMakeLists.txt b/src/sound/CMakeLists.txt
index 32d72a34f..d991e5cc2 100644
--- a/src/sound/CMakeLists.txt
+++ b/src/sound/CMakeLists.txt
@@ -16,8 +16,8 @@
 add_library(snd OBJECT sound.c openal.c snd_opl.c snd_opl_nuked.c snd_resid.cc
 	midi.c midi_system.c snd_speaker.c snd_pssj.c snd_lpt_dac.c
 	snd_lpt_dss.c snd_adlib.c snd_adlibgold.c snd_ad1848.c snd_audiopci.c
-	snd_azt2316a.c snd_cms.c snd_gus.c snd_sb.c snd_sb_dsp.c snd_emu8k.c
-	snd_mpu401.c snd_sn76489.c snd_ssi2001.c snd_wss.c snd_ym7128.c)
+	snd_azt2316a.c snd_cms.c snd_cs423x.c snd_gus.c snd_sb.c snd_sb_dsp.c
+	snd_emu8k.c snd_mpu401.c snd_sn76489.c snd_ssi2001.c snd_wss.c snd_ym7128.c)
 
 if(FLUIDSYNTH)
 	target_compile_definitions(snd PRIVATE USE_FLUIDSYNTH)