diff --git a/python/taichi/misc/gui.py b/python/taichi/misc/gui.py
index e921f3006043c..e0bf309061dec 100644
--- a/python/taichi/misc/gui.py
+++ b/python/taichi/misc/gui.py
@@ -196,7 +196,7 @@ def clear(self, color=None):
     def cook_image(self, img):
         if img.dtype in [np.uint8, np.uint16, np.uint32, np.uint64]:
             img = img.astype(np.float32) * (1 / np.iinfo(img.dtype).max)
-        elif img.dtype in [np.float32, np.float64]:
+        elif img.dtype in [np.float16, np.float32, np.float64]:
             img = img.astype(np.float32)
         else:
             raise ValueError(