diff --git a/coders/tga.c b/coders/tga.c
index 3d31bee..ebfd74e 100644
--- a/coders/tga.c
+++ b/coders/tga.c
@@ -223,7 +223,7 @@
*/
image->columns=tga_info.width;
image->rows=tga_info.height;
- image->matte=tga_info.bits_per_pixel == 32 ? MagickTrue : MagickFalse;
+ image->matte=(tga_info.attributes & 0x0FU) != 0 ? MagickTrue : MagickFalse;
if ((tga_info.image_type != TGAColormap) &&
(tga_info.image_type != TGARLEColormap))
image->depth=(size_t) ((tga_info.bits_per_pixel <= 8) ? 8 :
@@ -425,7 +425,7 @@
(1UL*(j & 0xe0) >> 5),range);
pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),range);
if (image->matte != MagickFalse)
- pixel.opacity=(k & 0x80) != 0 ? (Quantum) OpaqueOpacity :
+ pixel.opacity=(k & 0x80) == 0 ? (Quantum) OpaqueOpacity :
(Quantum) TransparentOpacity;
if (image->storage_class == PseudoClass)
index=ConstrainColormapIndex(image,((size_t) k << 8)+j);