diff --git a/hw/xbox/Makefile.objs b/hw/xbox/Makefile.objs
index 6938798715..ce018cb898 100644
--- a/hw/xbox/Makefile.objs
+++ b/hw/xbox/Makefile.objs
@@ -10,3 +10,6 @@ obj-y += chihiro-usb.o
 
 obj-y += dsp/
 obj-y += nv2a/
+
+xid-sdl.o-cflags := $(SDL_CFLAGS)
+xid-sdl.o-libs := $(SDL_LIBS)
diff --git a/hw/xbox/dsp/Makefile.objs b/hw/xbox/dsp/Makefile.objs
index 93a180dee6..9313398201 100644
--- a/hw/xbox/dsp/Makefile.objs
+++ b/hw/xbox/dsp/Makefile.objs
@@ -1 +1,5 @@
 obj-y += dsp.o dsp_cpu.o dsp_dma.o
+
+# dsp_cpu.c uses SDL_GetTicks()
+dsp_cpu.o-cflags := $(SDL_CFLAGS)
+dsp_cpu.o-libs := $(SDL_LIBS)