diff --git a/autotests/write/bwa.tga b/autotests/write/bwa.tga
index c0b2ab8..486aad4 100644
Binary files a/autotests/write/bwa.tga and b/autotests/write/bwa.tga differ
diff --git a/autotests/write/rgba.tga b/autotests/write/rgba.tga
index d1fe862..ace8015 100644
Binary files a/autotests/write/rgba.tga and b/autotests/write/rgba.tga differ
diff --git a/src/imageformats/tga.cpp b/src/imageformats/tga.cpp
index e067bc8..04127d2 100644
--- a/src/imageformats/tga.cpp
+++ b/src/imageformats/tga.cpp
@@ -430,6 +430,9 @@ bool TGAHandler::write(const QImage &image)
 
     const QImage &img = image;
     const bool hasAlpha = (img.format() == QImage::Format_ARGB32);
+    static constexpr quint8 originTopLeft = TGA_ORIGIN_UPPER + TGA_ORIGIN_LEFT; // 0x20
+    static constexpr quint8 alphaChannel8Bits = 0x08;
+
     for (int i = 0; i < 12; i++) {
         s << targaMagic[i];
     }
@@ -438,7 +441,7 @@ bool TGAHandler::write(const QImage &image)
     s << quint16(img.width()); // width
     s << quint16(img.height()); // height
     s << quint8(hasAlpha ? 32 : 24); // depth (24 bit RGB + 8 bit alpha)
-    s << quint8(hasAlpha ? 0x24 : 0x20); // top left image (0x20) + 8 bit alpha (0x4)
+    s << quint8(hasAlpha ? originTopLeft + alphaChannel8Bits : originTopLeft);   // top left image (0x20) + 8 bit alpha (0x8)
 
     for (int y = 0; y < img.height(); y++) {
         for (int x = 0; x < img.width(); x++) {