diff --git a/hloc/utils/database.py b/hloc/utils/database.py
index c8a7aa5c..6be9d51a 100644
--- a/hloc/utils/database.py
+++ b/hloc/utils/database.py
@@ -183,8 +183,8 @@ def add_image(
         self,
         name,
         camera_id,
-        prior_q=np.full(4, np.NaN),
-        prior_t=np.full(3, np.NaN),
+        prior_q=np.full(4, np.nan),
+        prior_t=np.full(3, np.nan),
         image_id=None,
     ):
         cursor = self.execute(