diff --git a/libavcodec/pcx.c b/libavcodec/pcx.c
index d60e5020c2..6163c6e407 100644
--- a/libavcodec/pcx.c
+++ b/libavcodec/pcx.c
@@ -119,7 +119,7 @@ static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     bytes_per_line     = bytestream2_get_le16u(&gb);
     bytes_per_scanline = nplanes * bytes_per_line;
 
-    if (bytes_per_scanline < w * bits_per_pixel * nplanes / 8) {
+    if (bytes_per_scanline < (w * bits_per_pixel * nplanes + 7) / 8) {
         av_log(avctx, AV_LOG_ERROR, "PCX data is corrupted\n");
         return AVERROR_INVALIDDATA;
     }