diff --git a/MagickCore/draw.c b/MagickCore/draw.c
index 9e816b2..3478c36 100644
--- a/MagickCore/draw.c
+++ b/MagickCore/draw.c
@@ -3946,7 +3946,7 @@
/*
Draw polygon or line.
*/
- if (image->alpha_trait != BlendPixelTrait)
+ if (image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
start=(ssize_t) ceil(bounds.y1-0.5);
stop=(ssize_t) floor(bounds.y2+0.5);
@@ -4326,7 +4326,7 @@
}
case MattePrimitive:
{
- if (image->alpha_trait != BlendPixelTrait)
+ if (image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
switch (primitive_info->method)
{
@@ -4522,7 +4522,7 @@
(void) TransformImage(&composite_image,(char *) NULL,geometry,
exception);
}
- if (composite_image->alpha_trait != BlendPixelTrait)
+ if (composite_image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel,
exception);
if (draw_info->alpha != OpaqueAlpha)