diff --git a/nes/nc_projections/default_nes.py b/nes/nc_projections/default_nes.py
index f81b8fe15abb4f0ec2baea3a2f6e5ea38e3ea605..5c2fcd0350e1c05a4af589ad571891270d3e4143 100644
--- a/nes/nc_projections/default_nes.py
+++ b/nes/nc_projections/default_nes.py
@@ -1205,8 +1205,8 @@ class Nes(object):
             self.time = [self.time[0]]
             self._time = [self._time[0]]
         if axis == 'Z':
-            self.lev['data'] = [self.lev['data'][0]]
-            self._lev['data'] = [self._lev['data'][0]]
+            self.lev['data'] = np.array([self.lev['data'][0]])
+            self._lev['data'] = np.array([self._lev['data'][0]])
 
         return None