diff --git a/sotodlib/core/context.py b/sotodlib/core/context.py
index 8123fdac4..b685ae466 100644
--- a/sotodlib/core/context.py
+++ b/sotodlib/core/context.py
@@ -143,7 +143,7 @@ def get_obs(self, obs_id=None, dets=None, detsets=None,
             loader_type = self.get('obs_loader_type', 'default')
 
         # Load TOD.
-        from sotodlib.io.load import OBSLOADER_REGISTRY
+        from ..io.load import OBSLOADER_REGISTRY
         loader_func = OBSLOADER_REGISTRY[loader_type]  # Register your loader?
         aman = loader_func(self.obsfiledb, obs_id, dets)
 
diff --git a/sotodlib/g3_condition.py b/sotodlib/g3_condition.py
index 01a765041..221808281 100644
--- a/sotodlib/g3_condition.py
+++ b/sotodlib/g3_condition.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2018-2019 Simons Observatory.
+# Copyright (c) 2018-2020 Simons Observatory.
 # Full license can be found in the top level "LICENSE" file.
 """Data Conditioning
 
@@ -12,7 +12,7 @@
 import scipy.signal as signal
 
 from spt3g import core
-from sotodlib.core.g3_core import DataG3Module
+from .core.g3_core import DataG3Module
 
 class MeanSubtract(DataG3Module):
     def process(self, data, det_name):
diff --git a/sotodlib/g3_filter.py b/sotodlib/g3_filter.py
index 862963f5c..ef8382515 100644
--- a/sotodlib/g3_filter.py
+++ b/sotodlib/g3_filter.py
@@ -9,7 +9,7 @@
 import scipy.signal as signal
 
 from spt3g import core
-from sotodlib.core.g3_core import DataG3Module
+from .core.g3_core import DataG3Module
 
 class Filter(DataG3Module):
     """
diff --git a/sotodlib/g3_sim.py b/sotodlib/g3_sim.py
index 8d8ef984c..136b4cafb 100644
--- a/sotodlib/g3_sim.py
+++ b/sotodlib/g3_sim.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2018-2019 Simons Observatory.
+# Copyright (c) 2018-2020 Simons Observatory.
 # Full license can be found in the top level "LICENSE" file.
 """Data simulation.
 
@@ -9,7 +9,7 @@
 import numpy as np
 
 from spt3g import core
-from sotodlib.core.g3_core import DataG3Module
+from .core.g3_core import DataG3Module
 
 
 class PipelineSeeder(list):