diff --git a/python/lsst/drp/tasks/assemble_cell_coadd.py b/python/lsst/drp/tasks/assemble_cell_coadd.py
index 50a7d3c8..41c47388 100644
--- a/python/lsst/drp/tasks/assemble_cell_coadd.py
+++ b/python/lsst/drp/tasks/assemble_cell_coadd.py
@@ -328,7 +328,7 @@ def run(self, inputWarps, skyInfo, **kwargs):
         # Read in one warp at a time, and accumulate it in all the cells that
         # it completely overlaps.
         for warpRef, artifactMaskRef in zip(inputWarps, artifactMasks):
-            warp = warpRef.get()
+            warp = warpRef.get(parameters={"bbox": skyInfo.bbox})
 
             warp.mask.addMaskPlane("CLIPPED")
             warp.mask.addMaskPlane("REJECTED")