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-rw-r--r--ext/gd/gd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index ad2db04a3c..ae835a8db7 100644
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -3755,9 +3755,11 @@ static void _php_image_bw_convert(gdImagePtr im_org, gdIOCtx *out, int threshold
return;
}
+#if HAVE_LIBGD20
if (im_org->trueColor) {
gdImageTrueColorToPalette(im_org, 1, 256);
}
+#endif
for (y = 0; y < dest_height; y++) {
for (x = 0; x < dest_width; x++) {