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-rw-r--r--src/PHPImageWorkshop/ImageWorkshop.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/PHPImageWorkshop/ImageWorkshop.php b/src/PHPImageWorkshop/ImageWorkshop.php
index a523be4..d45b74e 100644
--- a/src/PHPImageWorkshop/ImageWorkshop.php
+++ b/src/PHPImageWorkshop/ImageWorkshop.php
@@ -128,7 +128,7 @@ class ImageWorkshop
{
$opacity = 0;
- if (!$backgroundColor || $backgroundColor == 'transparent') {
+ if (null === $backgroundColor || $backgroundColor == 'transparent') {
$opacity = 127;
$backgroundColor = 'ffffff';
}