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-rw-r--r--source/fitz/draw-unpack.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/source/fitz/draw-unpack.c b/source/fitz/draw-unpack.c
index 8ac76bdc..ccb3c62f 100644
--- a/source/fitz/draw-unpack.c
+++ b/source/fitz/draw-unpack.c
@@ -222,7 +222,7 @@ fz_decode_tile(fz_context *ctx, fz_pixmap *pix, const float *decode)
unsigned char *p = pix->samples;
int stride = pix->stride - pix->w * pix->n;
int len;
- int n = fz_maxi(1, pix->n - 1);
+ int n = fz_maxi(1, pix->n - pix->alpha);
int needed;
int k;
int h;