diff --git a/src/android/i_sound.c b/src/android/i_sound.c
index 6f70134b0..48831956a 100644
--- a/src/android/i_sound.c
+++ b/src/android/i_sound.c
@@ -184,3 +184,8 @@ UINT32 I_GetMusicPosition(void)
 {
         return 0;
 }
+
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
diff --git a/src/djgppdos/i_sound.c b/src/djgppdos/i_sound.c
index dbf7a0142..f722bec00 100644
--- a/src/djgppdos/i_sound.c
+++ b/src/djgppdos/i_sound.c
@@ -592,3 +592,8 @@ musictype_t I_MusicType(void)
 {
 	return MU_NONE;
 }
+
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
diff --git a/src/dummy/i_sound.c b/src/dummy/i_sound.c
index 4cea29049..b464079b2 100644
--- a/src/dummy/i_sound.c
+++ b/src/dummy/i_sound.c
@@ -146,6 +146,11 @@ boolean I_SetSongTrack(int track)
 	return false;
 }
 
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
+
 UINT32 I_GetMusicLength(void)
 {
 	return 0;
diff --git a/src/sdl/sdl_sound.c b/src/sdl/sdl_sound.c
index e88d874fd..6b6674cd7 100644
--- a/src/sdl/sdl_sound.c
+++ b/src/sdl/sdl_sound.c
@@ -1664,6 +1664,12 @@ musictype_t I_MusicType(void)
 	return MU_NONE;
 }
 
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
+
+
 void I_UnRegisterSong(INT32 handle)
 {
 #ifdef HAVE_MIXER
@@ -2021,6 +2027,11 @@ boolean I_SetSongTrack(int track)
 	return false;
 }
 
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
+
 #ifdef MIXER_POS
 static void SDLCALL I_FinishMusic(void)
 {
diff --git a/src/win32/win_snd.c b/src/win32/win_snd.c
index 066392a41..bc5ab4ad7 100644
--- a/src/win32/win_snd.c
+++ b/src/win32/win_snd.c
@@ -873,6 +873,11 @@ boolean I_SetSongTrack(INT32 track)
 	return false;
 }
 
+void I_SetInternalMusicVolume(UINT8 volume)
+{
+	(void)volume;
+}
+
 //
 // Fuck MIDI. ... Okay fine, you can have your silly D_-only mode.
 //