diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index 29f9adf588..f95c329e76 100644
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -440,6 +440,8 @@ static int find_smallest_bounding_rectangle(AVSubtitle *s)
 
 #ifdef DEBUG
 #undef fprintf
+#undef perror
+#undef exit
 static void ppm_save(const char *filename, uint8_t *bitmap, int w, int h,
                      uint32_t *rgba_palette)
 {