diff --git a/src/odemis/acq/stream/_base.py b/src/odemis/acq/stream/_base.py
index 54fa0ccaed..b790206b67 100644
--- a/src/odemis/acq/stream/_base.py
+++ b/src/odemis/acq/stream/_base.py
@@ -166,11 +166,6 @@ def __init__(self, name, detector, dataflow, emitter, focuser=None, opm=None,
         else:
             self.raw = raw
 
-        # initialize the projected tiles cache
-        self._projectedTilesCache = {}
-        # initialize the raw tiles cache
-        self._rawTilesCache = {}
-
         # TODO: should better be based on a BufferedDataFlow: subscribing starts
         # acquisition and sends (raw) data to whoever is interested. .get()
         # returns the previous or next image acquired.