diff --git a/src/Intervention/Image/AbstractEncoder.php b/src/Intervention/Image/AbstractEncoder.php
index d3e59eaa..f5923109 100644
--- a/src/Intervention/Image/AbstractEncoder.php
+++ b/src/Intervention/Image/AbstractEncoder.php
@@ -171,7 +171,7 @@ abstract class AbstractEncoder
                 
             default:
                 throw new NotSupportedException(
-                    "Encoding format ({$format}) is not supported."
+                    "Encoding format ({$this->format}) is not supported."
                 );
         }