diff --git a/Tests/test_file_tiff.py b/Tests/test_file_tiff.py
index a94e4dc33..c53bb87e8 100644
--- a/Tests/test_file_tiff.py
+++ b/Tests/test_file_tiff.py
@@ -611,6 +611,17 @@ class TestFileTiff:
         with Image.open(infile) as im:
             assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png")
 
+    def test_planar_configuration_save(self, tmp_path):
+        infile = "Tests/images/tiff_tiled_planar_raw.tif"
+        with Image.open(infile) as im:
+            assert im._planar_configuration == 2
+
+            outfile = str(tmp_path / "temp.tif")
+            im.save(outfile)
+
+            with Image.open(outfile) as reloaded:
+                assert_image_equal_tofile(reloaded, infile)
+
     def test_palette(self, tmp_path):
         def roundtrip(mode):
             outfile = str(tmp_path / "temp.tif")
diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index 4165fabfc..e96f58440 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -1580,7 +1580,7 @@ def _save(im, fp, filename):
     libtiff = WRITE_LIBTIFF or compression != "raw"
 
     # required for color libtiff images
-    ifd[PLANAR_CONFIGURATION] = getattr(im, "_planar_configuration", 1)
+    ifd[PLANAR_CONFIGURATION] = 1
 
     ifd[IMAGEWIDTH] = im.size[0]
     ifd[IMAGELENGTH] = im.size[1]