test_surfaces_CFLAGS = $(TEST_CFLAGS) $(TEST_X11_CFLAGS)
test_surfaces_LDADD = $(TEST_LIBS) $(TEST_X11_LIBS)
-test_windows_SOURCES = test-windows.c
+test_windows_SOURCES = test-windows.c image.c
test_windows_CFLAGS = $(TEST_CFLAGS) $(TEST_X11_CFLAGS)
test_windows_LDADD = $(TEST_LIBS) $(TEST_X11_LIBS)