diff --git a/common/include/args.h b/common/include/args.h
index 06989ea56..05f417e8b 100644
--- a/common/include/args.h
+++ b/common/include/args.h
@@ -73,6 +73,11 @@ struct CArg : prohibit_void_ptr<CArg>
 	bool SysNoHogDir;
 #endif
 	bool SysShowCmdHelp;
+#ifdef USE_SDLMIXER
+	bool SndDisableSdlMixer;
+#else
+	static constexpr tt::true_type SndDisableSdlMixer{};
+#endif
 	int DbgVerbose;
 	int SysMaxFPS;
 	std::string SysMissionDir;
@@ -95,11 +100,6 @@ struct Arg : prohibit_void_ptr<Arg>
 	bool CtlNoJoystick;
 	bool SndNoSound;
 	bool SndNoMusic;
-#ifdef USE_SDLMIXER
-	bool SndDisableSdlMixer;
-#else
-	static constexpr tt::true_type SndDisableSdlMixer{};
-#endif
 	bool GfxSkipHiresFNT;
 #ifdef DXX_BUILD_DESCENT_I
 	bool EdiNoBm;
diff --git a/d2x-rebirth/libmve/mveplay.cpp b/d2x-rebirth/libmve/mveplay.cpp
index 65554d4ab..824af1de2 100644
--- a/d2x-rebirth/libmve/mveplay.cpp
+++ b/d2x-rebirth/libmve/mveplay.cpp
@@ -351,7 +351,7 @@ static int create_audiobuf_handler(unsigned char, unsigned char minor, const uns
 		format = AUDIO_U8;
 	}
 
-	if (GameArg.SndDisableSdlMixer)
+	if (CGameArg.SndDisableSdlMixer)
 	{
 		con_printf(CON_CRITICAL, "creating audio buffers:");
 		con_printf(CON_CRITICAL, "sample rate = %d, desired buffer = %d, stereo = %d, bitsize = %d, compressed = %d",
@@ -367,7 +367,7 @@ static int create_audiobuf_handler(unsigned char, unsigned char minor, const uns
 	mve_audio_spec->userdata = NULL;
 
 	// MD2211: if using SDL_Mixer, we never reinit the sound system
-	if (GameArg.SndDisableSdlMixer)
+	if (CGameArg.SndDisableSdlMixer)
 	{
 		if (SDL_OpenAudio(mve_audio_spec.get(), NULL) >= 0) {
 			con_printf(CON_CRITICAL, "   success");
@@ -397,7 +397,7 @@ static int play_audio_handler(unsigned char, unsigned char, const unsigned char
 {
 	if (mve_audio_canplay  &&  !mve_audio_playing  &&  mve_audio_bufhead != mve_audio_buftail)
 	{
-		if (GameArg.SndDisableSdlMixer)
+		if (CGameArg.SndDisableSdlMixer)
 			SDL_PauseAudio(0);
 #ifdef USE_SDLMIXER
 		else
@@ -458,7 +458,7 @@ static int audio_data_handler(unsigned char major, unsigned char, const unsigned
 
 			// MD2211: the following block does on-the-fly audio conversion for SDL_mixer
 #ifdef USE_SDLMIXER
-			if (!GameArg.SndDisableSdlMixer) {
+			if (!CGameArg.SndDisableSdlMixer) {
 				// build converter: in = MVE format, out = SDL_mixer output
 				Mix_QuerySpec(&out_freq, &out_format, &out_channels); // get current output settings
 
@@ -749,7 +749,7 @@ void MVE_rmEndMovie(std::unique_ptr<MVESTREAM>)
 
 	if (mve_audio_canplay) {
 		// MD2211: if using SDL_Mixer, we never reinit sound, hence never close it
-		if (GameArg.SndDisableSdlMixer)
+		if (CGameArg.SndDisableSdlMixer)
 		{
 			SDL_CloseAudio();
 		}
diff --git a/d2x-rebirth/main/movie.cpp b/d2x-rebirth/main/movie.cpp
index 4760c16fc..d6d0869cd 100644
--- a/d2x-rebirth/main/movie.cpp
+++ b/d2x-rebirth/main/movie.cpp
@@ -168,7 +168,7 @@ int PlayMovie(const char *subtitles, const char *filename, int must_have)
 	songs_stop_all();
 
 	// MD2211: if using SDL_Mixer, we never reinit the sound system
-	if (GameArg.SndDisableSdlMixer)
+	if (CGameArg.SndDisableSdlMixer)
 		digi_close();
 
 	// Start sound
@@ -178,7 +178,7 @@ int PlayMovie(const char *subtitles, const char *filename, int must_have)
 
 	// MD2211: if using SDL_Mixer, we never reinit the sound system
 	if (!GameArg.SndNoSound
-		&& GameArg.SndDisableSdlMixer
+		&& CGameArg.SndDisableSdlMixer
 	)
 		digi_init();
 
diff --git a/similar/arch/sdl/init.cpp b/similar/arch/sdl/init.cpp
index fcdc532f6..5faac5c02 100644
--- a/similar/arch/sdl/init.cpp
+++ b/similar/arch/sdl/init.cpp
@@ -49,7 +49,7 @@ void arch_init(void)
 	key_init();
 
 	int system = SDLAUDIO_SYSTEM;
-	if (!GameArg.SndDisableSdlMixer)
+	if (!CGameArg.SndDisableSdlMixer)
 		system = SDLMIXER_SYSTEM;
 	digi_select_system( system );
 
diff --git a/similar/main/piggy.cpp b/similar/main/piggy.cpp
index f324dbf01..86919f1d9 100644
--- a/similar/main/piggy.cpp
+++ b/similar/main/piggy.cpp
@@ -958,7 +958,7 @@ int read_hamfile()
 		{
 			shareware = 1;
 			GameArg.SndDigiSampleRate = SAMPLE_RATE_11K;
-			if (GameArg.SndDisableSdlMixer)
+			if (CGameArg.SndDisableSdlMixer)
 			{
 				digi_close();
 				digi_init();
diff --git a/similar/main/songs.cpp b/similar/main/songs.cpp
index b3010118e..9a3ccc74a 100644
--- a/similar/main/songs.cpp
+++ b/similar/main/songs.cpp
@@ -158,7 +158,7 @@ static void songs_init()
 		GameCfg.MusicType = MUSIC_TYPE_NONE;
 
 	// If SDL_Mixer is not supported (or deactivated), switch to no-music type if SDL_mixer-related music type was selected
-	if (GameArg.SndDisableSdlMixer)
+	if (CGameArg.SndDisableSdlMixer)
 	{
 #ifndef _WIN32
 		if (GameCfg.MusicType == MUSIC_TYPE_BUILTIN)
diff --git a/similar/misc/args.cpp b/similar/misc/args.cpp
index 2c704791e..7bb989322 100644
--- a/similar/misc/args.cpp
+++ b/similar/misc/args.cpp
@@ -260,7 +260,7 @@ static void ReadCmdArgs(Inilist &ini, Arglist &Args)
 		else if (!d_stricmp(p, "-nosdlmixer"))
 		{
 #ifdef USE_SDLMIXER
-			GameArg.SndDisableSdlMixer = true;
+			CGameArg.SndDisableSdlMixer = true;
 #endif
 		}