diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index 53287bd122..6b94292c04 100644
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -345,7 +345,7 @@ static int decode_dvd_subtitles(DVDSubContext *ctx, AVSubtitle *sub_header,
             w = x2 - x1 + 1;
             if (w < 0)
                 w = 0;
-            h = y2 - y1;
+            h = y2 - y1 + 1;
             if (h < 0)
                 h = 0;
             if (w > 0 && h > 0) {