diff --git a/torchvision/transforms/functional.py b/torchvision/transforms/functional.py
index dcc9c5ffa57..8a6daf2dd9f 100644
--- a/torchvision/transforms/functional.py
+++ b/torchvision/transforms/functional.py
@@ -115,9 +115,9 @@ def to_pil_image(pic, mode=None):
         npimg = npimg[:, :, 0]
         if npimg.dtype == np.uint8:
             expected_mode = 'L'
-        if npimg.dtype == np.int16:
+        elif npimg.dtype == np.int16:
             expected_mode = 'I;16'
-        if npimg.dtype == np.int32:
+        elif npimg.dtype == np.int32:
             expected_mode = 'I'
         elif npimg.dtype == np.float32:
             expected_mode = 'F'