diff --git a/dlls/winmm/tests/capture.c b/dlls/winmm/tests/capture.c
index 645e4c30fe0..93e46dbb278 100644
--- a/dlls/winmm/tests/capture.c
+++ b/dlls/winmm/tests/capture.c
@@ -28,7 +28,6 @@
 #include "winbase.h"
 #include "winnls.h"
 #include "mmsystem.h"
-#include "mmddk.h"
 #define NOBITMAP
 #include "mmreg.h"
 
diff --git a/dlls/winmm/tests/mixer.c b/dlls/winmm/tests/mixer.c
index 1380b0c56ee..a9022547267 100644
--- a/dlls/winmm/tests/mixer.c
+++ b/dlls/winmm/tests/mixer.c
@@ -33,7 +33,6 @@
 #include "winbase.h"
 #include "winnls.h"
 #include "mmsystem.h"
-#include "mmddk.h"
 
 #include "winmm_test.h"
 
diff --git a/dlls/winmm/tests/wave.c b/dlls/winmm/tests/wave.c
index 45a2cd3f3d3..76866ecc231 100644
--- a/dlls/winmm/tests/wave.c
+++ b/dlls/winmm/tests/wave.c
@@ -28,7 +28,6 @@
 #include "winbase.h"
 #include "winnls.h"
 #include "mmsystem.h"
-#include "mmddk.h"
 #define NOBITMAP
 #include "mmreg.h"
 #include "ks.h"