diff --git a/coders/psd.c b/coders/psd.c
index f98f2bb088b..76e1bf7a3d9 100644
--- a/coders/psd.c
+++ b/coders/psd.c
@@ -1022,7 +1022,7 @@ static MagickBooleanType ReadPSDChannelPixels(Image *image,const ssize_t row,
           number_bits=8;
         for (bit = 0; bit < (ssize_t) number_bits; bit++)
         {
-          SetPSDPixel(image,channel,packet_size,(((unsigned char) pixel)
+          SetPSDPixel(image,channel,packet_size,(((unsigned char)((ssize_t)pixel))
             & (0x01 << (7-bit))) != 0 ? 0 : QuantumRange,q,exception);
           q+=GetPixelChannels(image);
           x++;