diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
index 77caa0b9d..7735b5bea 100644
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@@ -231,6 +231,16 @@ class TestFileLibTiff(LibTiffTestCase):
 
         TiffImagePlugin.WRITE_LIBTIFF = False
 
+    def test_int_dpi(self):
+        # issue #1765
+        im = hopper('RGB')
+        out = self.tempfile('temp.tif')
+        TiffImagePlugin.WRITE_LIBTIFF = True
+        im.save(out, dpi=(72, 72))
+        TiffImagePlugin.WRITE_LIBTIFF = False
+        reloaded = Image.open(out)
+        self.assertEqual(reloaded.info['dpi'], (72.0, 72.0))
+
     def test_g3_compression(self):
         i = Image.open('Tests/images/hopper_g4_500.tif')
         out = self.tempfile("temp.tif")