diff --git a/Tests/test_imagewin.py b/Tests/test_imagewin.py
index df50478a2c4..80126d4d029 100644
--- a/Tests/test_imagewin.py
+++ b/Tests/test_imagewin.py
@@ -101,7 +101,7 @@ def test_dib_paste_bbox(self) -> None:
         # Assert
         assert dib.size == (128, 128)
 
-        with pytest.raises(ValueError, match="images do not match"):
+        with pytest.raises(ValueError, match="box must match image size"):
             dib.paste(im, (0, 0, 1, 1))
 
     def test_dib_frombytes_tobytes_roundtrip(self) -> None:
diff --git a/src/display.c b/src/display.c
index 4a2d9d9b256..e84f0a8b652 100644
--- a/src/display.c
+++ b/src/display.c
@@ -135,12 +135,12 @@ _paste(ImagingDisplayObject *display, PyObject *args) {
     if (xy[2] <= xy[0]) {
         xy[2] = xy[0] + im->xsize;
     } else if (xy[2] - xy[0] != im->xsize) {
-        return ImagingError_Mismatch();
+        return ImagingError_Mismatch("box must match image size");
     }
     if (xy[3] <= xy[1]) {
         xy[3] = xy[1] + im->ysize;
     } else if (xy[3] - xy[1] != im->ysize) {
-        return ImagingError_Mismatch();
+        return ImagingError_Mismatch("box must match image size");
     }
 
     ImagingPasteDIB(display->dib, im, xy);