diff --git a/Tests/images/op_index.qoi b/Tests/images/op_index.qoi
new file mode 100644
index 00000000000..e626aafe6a4
Binary files /dev/null and b/Tests/images/op_index.qoi differ
diff --git a/Tests/test_file_qoi.py b/Tests/test_file_qoi.py
index fd4b981ce93..7ce1da2099d 100644
--- a/Tests/test_file_qoi.py
+++ b/Tests/test_file_qoi.py
@@ -28,3 +28,9 @@ def test_invalid_file() -> None:
 
     with pytest.raises(SyntaxError):
         QoiImagePlugin.QoiImageFile(invalid_file)
+
+
+def test_op_index() -> None:
+    # QOI_OP_INDEX as the first chunk
+    with Image.open("Tests/images/op_index.qoi") as im:
+        assert im.getpixel((0, 0)) == (0, 0, 0, 0)
diff --git a/src/PIL/QoiImagePlugin.py b/src/PIL/QoiImagePlugin.py
index df552243e37..75070abd740 100644
--- a/src/PIL/QoiImagePlugin.py
+++ b/src/PIL/QoiImagePlugin.py
@@ -51,7 +51,7 @@ def decode(self, buffer: bytes | Image.SupportsArrayInterface) -> tuple[int, int
         assert self.fd is not None
 
         self._previously_seen_pixels = {}
-        self._add_to_previous_pixels(bytearray((0, 0, 0, 255)))
+        self._previous_pixel = bytearray((0, 0, 0, 255))
 
         data = bytearray()
         bands = Image.getmodebands(self.mode)