diff --git a/src/sound/mididevices/music_win_mididevice.cpp b/src/sound/mididevices/music_win_mididevice.cpp
index 94c8a0b36ac..1bc42116e25 100644
--- a/src/sound/mididevices/music_win_mididevice.cpp
+++ b/src/sound/mididevices/music_win_mididevice.cpp
@@ -42,7 +42,6 @@
 
 #include "i_musicinterns.h"
 #include "templates.h"
-#include "doomdef.h"
 #include "m_swap.h"
 #include "doomerrors.h"
 
diff --git a/src/sound/music/i_music.h b/src/sound/music/i_music.h
index 421bf1355ad..714cbd95fd6 100644
--- a/src/sound/music/i_music.h
+++ b/src/sound/music/i_music.h
@@ -34,7 +34,6 @@
 #ifndef __I_MUSIC_H__
 #define __I_MUSIC_H__
 
-#include "doomdef.h"
 #include "i_soundinternal.h"
 
 class FileReader;
diff --git a/src/sound/music/i_musicinterns.h b/src/sound/music/i_musicinterns.h
index 09bba62dca2..53d2b81a734 100644
--- a/src/sound/music/i_musicinterns.h
+++ b/src/sound/music/i_musicinterns.h
@@ -5,7 +5,6 @@
 #include "mus2midi.h"
 #include "i_sound.h"
 #include "i_music.h"
-#include "s_sound.h"
 #include "files.h"
 #include "wildmidi/wildmidi_lib.h"
 #include "midisources/midisource.h"
diff --git a/src/sound/timidity/instrum_dls.cpp b/src/sound/timidity/instrum_dls.cpp
index bc6b5b5d27c..1ddf6660742 100644
--- a/src/sound/timidity/instrum_dls.cpp
+++ b/src/sound/timidity/instrum_dls.cpp
@@ -26,7 +26,6 @@
 #include <math.h>
 
 #include "timidity.h"
-#include "doomdef.h"
 
 #define __Sound_SetError(x)
 
diff --git a/src/sound/timidity/instrum_sf2.cpp b/src/sound/timidity/instrum_sf2.cpp
index 3f50f15750d..87b5ee4bea7 100644
--- a/src/sound/timidity/instrum_sf2.cpp
+++ b/src/sound/timidity/instrum_sf2.cpp
@@ -4,7 +4,6 @@
 #include <math.h>
 #include <memory>
 
-#include "doomdef.h"
 #include "m_swap.h"
 #include "templates.h"
 #include "timidity.h"