diff --git a/spec/Zpl/ImageSpec.php b/spec/Zpl/ImageSpec.php
index 85e4cbc..7cb7c6b 100644
--- a/spec/Zpl/ImageSpec.php
+++ b/spec/Zpl/ImageSpec.php
@@ -26,6 +26,14 @@ function it_converts_large_images_to_compressed_ascii_hexadecimal_bitmaps()
 
         $this->toAscii()->shouldReturn(file_get_contents(__DIR__ . '/../test_1000.txt'));
     }
+    
+    function it_interpets_transparent_as_white()
+    {
+        $decoder = GdDecoder::fromPath(__DIR__ . '/../test_85.png');
+        $this->beConstructedWith($decoder);
+        
+        $this->toAscii()->shouldReturn(trim(file_get_contents(__DIR__ . '/../test_85.txt')));
+    }
 
     function it_gets_the_height_of_the_image_in_rows()
     {
diff --git a/spec/test_85.png b/spec/test_85.png
new file mode 100644
index 0000000..56bc2b9
Binary files /dev/null and b/spec/test_85.png differ
diff --git a/spec/test_85.txt b/spec/test_85.txt
new file mode 100644
index 0000000..72a1b3e
--- /dev/null
+++ b/spec/test_85.txt
@@ -0,0 +1 @@
+Q03,Q078,Q0DC,Q09C,P019A,P0369,P036C8,P02EC8,K01EI07EC4,K01FC005EC4,K01C700DEC2,K0259C0DFC2,K026E70FF4,K026F18BFC1,K0237CDBEC1,K0237F7BEC,K021BFBDEC,K020DFDEEC08,K020EFEF6C08,K02067F76C08,K02033FBA808,K02019FDD808,K0200EFFD8080FFC,K020073EF8087IF,K020039E7009JFC,K02I0E5F00KFE,K02I07A301LF,K03I01C107LF8,K01J0C08MFC,K01L01MFC,K01L03MFE,K018K03MFE,L08K01NF,L08K011MF,L08K01F7FF7IF,L04L03DFF9IF8,L02M07F4EIF8,L018L01F43BFF8,M06M0740EFF8,M01CL01C03BF8,N03F8N0FF8,Y07F8,Y01F,,U04,U0406,Q08001013,Q0E0010218,Q0AJ021C,I03F8J01AJ021C,001IFJ01FK01C,007IF8I01F8I022C,00JFEI03E8J064,03KFI03F4J0DC,03KF8007FAJ07C,07KFC007FDJ038,0LFC007FE8,0LFE00FFEC,1LFE00IF4,1LFE00IFC,3MF01IF,1MF01IF,1JFE1F01IF8,1JF80600IFC,3JFK0IFA,3JFK0DFFD,3JFK07IF8,7JFK06IF8,7JFK03IF8,7JF8J01FFEC,7JF8K0IFC,7JFCK07BE8,KFCK03FF8,KF8L0FF,JFE,:KF,KF8,7JF8,7JFC,::3JF4,3JFC,1JF8,0IFD,0JF,07IF,01FFE,007F8,,:::::::::
diff --git a/src/Zpl/GdDecoder.php b/src/Zpl/GdDecoder.php
index 2d974b2..5e893d9 100644
--- a/src/Zpl/GdDecoder.php
+++ b/src/Zpl/GdDecoder.php
@@ -29,6 +29,19 @@ public function __construct($image)
             imagepalettetotruecolor($image);
         }
 
+        // Converts transparancy to white.
+        $width = imagesx($image);
+        $height = imagesy($image);
+        $newImage = imagecreatetruecolor($width, $height);
+        $white = imagecolorallocate($newImage, 255, 255, 255);
+        imagefill($newImage, 0, 0, $white);
+        imagecopyresampled(
+            $newImage, $image,
+            0, 0, 0, 0,
+            $width, $height,
+            $width, $height);
+        $image = $newImage;
+        
         imagefilter($image, IMG_FILTER_GRAYSCALE);
 
         $this->image = $image;
@@ -119,3 +132,4 @@ public function getBitAt(int $x, int $y): int
         return (imagecolorat($this->image, $x, $y) & 0xFF) < 127 ? 1 : 0;
     }
 }
+