diff --git a/src/lib/FieldType/Image/Type.php b/src/lib/FieldType/Image/Type.php
index c369118406..ef84995998 100644
--- a/src/lib/FieldType/Image/Type.php
+++ b/src/lib/FieldType/Image/Type.php
@@ -323,6 +323,7 @@ public function toHash(SPIValue $value)
             'width' => $value->width,
             'height' => $value->height,
             'additionalData' => $value->additionalData,
+            'mime' => $value->mime,
         ];
     }
 
@@ -387,6 +388,7 @@ public function fromPersistenceValue(FieldValue $fieldValue)
                     ? $fieldValue->data['height']
                     : null),
                 'additionalData' => $fieldValue->data['additionalData'] ?? [],
+                'mime' => $fieldValue->data['mime'] ?? null,
             ]
         );
 
diff --git a/src/lib/FieldType/Image/Value.php b/src/lib/FieldType/Image/Value.php
index 4ca142d03b..d5cb87384a 100644
--- a/src/lib/FieldType/Image/Value.php
+++ b/src/lib/FieldType/Image/Value.php
@@ -93,6 +93,9 @@ class Value extends BaseValue
     /** @var string[] */
     public $additionalData = [];
 
+    /** @var string|null */
+    public $mime;
+
     /**
      * Construct a new Value object.
      */