diff --git a/dlls/dmcompos/Makefile.in b/dlls/dmcompos/Makefile.in
index d1e9b5e5b45..75662cb8633 100644
--- a/dlls/dmcompos/Makefile.in
+++ b/dlls/dmcompos/Makefile.in
@@ -1,6 +1,8 @@
 MODULE    = dmcompos.dll
 IMPORTS   = dxguid uuid ole32 advapi32
 
+EXTRADLLFLAGS = -mno-cygwin
+
 C_SRCS = \
 	chordmap.c \
 	chordmaptrack.c \
diff --git a/dlls/dmcompos/dmcompos_main.c b/dlls/dmcompos/dmcompos_main.c
index bcd66620136..21e896cc3ee 100644
--- a/dlls/dmcompos/dmcompos_main.c
+++ b/dlls/dmcompos/dmcompos_main.c
@@ -17,8 +17,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#include "config.h"
-#include "wine/port.h"
 
 #include <stdarg.h>
 
diff --git a/dlls/dmcompos/dmcompos_private.h b/dlls/dmcompos/dmcompos_private.h
index a74c1fb880a..1958c273786 100644
--- a/dlls/dmcompos/dmcompos_private.h
+++ b/dlls/dmcompos/dmcompos_private.h
@@ -34,7 +34,6 @@
 
 #include "wine/debug.h"
 #include "wine/list.h"
-#include "wine/unicode.h"
 #include "winreg.h"
 #include "objbase.h"