diff --git a/aosstower/level_00/rrd.py b/aosstower/level_00/rrd.py
index 084911197b85d28d29d7570b10a78a699a8dbe29..48ccaa3c9c101cd5e35423ac31901605758c28a4 100644
--- a/aosstower/level_00/rrd.py
+++ b/aosstower/level_00/rrd.py
@@ -6,7 +6,7 @@ from datetime import datetime, timedelta
 
 import rrdtool
 
-from metobscommon.data.calc import altimeter, dewpoint, wind_vector_components
+from metobscommon.util.calc import altimeter, dewpoint, wind_vector_components
 from metobscommon.util.mytime import to_epoch
 from aosstower import station