diff --git a/libavcodec/bink.c b/libavcodec/bink.c
index f83dc91710..f04017d4b4 100644
--- a/libavcodec/bink.c
+++ b/libavcodec/bink.c
@@ -869,7 +869,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
 
     binkb_init_bundles(c);
     ref_start = frame->data[plane_idx];
-    ref_end   = frame->data[plane_idx] + (bh * frame->linesize[plane_idx] + bw - 1) * 8;
+    ref_end   = frame->data[plane_idx] + ((bh - 1) * frame->linesize[plane_idx] + bw - 1) * 8;
 
     for (i = 0; i < 64; i++)
         coordmap[i] = (i & 7) + (i >> 3) * stride;
@@ -925,7 +925,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
-                if (ref < ref_start || ref + 8*stride > ref_end) {
+                if (ref < ref_start || ref > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
                     c->put_pixels_tab(dst, ref, stride, 8);
@@ -941,7 +941,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
-                if (ref < ref_start || ref + 8 * stride > ref_end) {
+                if (ref < ref_start || ref > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
                     c->put_pixels_tab(dst, ref, stride, 8);
@@ -973,7 +973,7 @@ static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
                 xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
                 yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
                 ref = dst + xoff + yoff * stride;
-                if (ref < ref_start || ref + 8 * stride > ref_end) {
+                if (ref < ref_start || ref > ref_end) {
                     av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
                 } else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
                     c->put_pixels_tab(dst, ref, stride, 8);