Need to import ntdll.

diff --git a/dlls/dsound/Makefile.in b/dlls/dsound/Makefile.in
index e4daa8a..4caa073 100644
--- a/dlls/dsound/Makefile.in
+++ b/dlls/dsound/Makefile.in
@@ -3,7 +3,7 @@
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 MODULE    = dsound.dll
-IMPORTS   = winmm advapi32 kernel32
+IMPORTS   = winmm advapi32 kernel32 ntdll
 EXTRALIBS = $(LIBUUID)
 
 LDDLLFLAGS = @LDDLLFLAGS@