diff --git a/python/slsdet/__init__.py b/python/slsdet/__init__.py
index 517c0f48d..f6df36332 100755
--- a/python/slsdet/__init__.py
+++ b/python/slsdet/__init__.py
@@ -10,7 +10,7 @@ from .gotthard import Gotthard
 from .moench import Moench
 
 import _slsdet
-
+xy = _slsdet.xy
 defs = _slsdet.slsDetectorDefs
 
 from .enums import *
diff --git a/python/slsdet/detector.py b/python/slsdet/detector.py
index 77e502780..ed0c8a519 100755
--- a/python/slsdet/detector.py
+++ b/python/slsdet/detector.py
@@ -10,6 +10,7 @@ detectorType = slsDetectorDefs.detectorType
 
 from .utils import element_if_equal, all_equal, get_set_bits, list_to_bitmask
 from .utils import Geometry, to_geo, element, reduce_time, is_iterable
+from _slsdet import xy
 from . import utils as ut
 from .proxy import JsonProxy, SlowAdcProxy, ClkDivProxy, MaxPhaseProxy, ClkFreqProxy
 from .registers import Register, Adc_register
@@ -262,6 +263,13 @@ class Detector(CppDetectorApi):
         """
         return to_geo(self.getDetectorSize())
 
+    @detsize.setter
+    def detsize(self, size):
+        if isinstance(size, xy):
+            self.setDetectorSize(size)
+        else:
+            self.setDetectorSize(xy(*size))
+
     @property
     def settings(self):
         """
diff --git a/python/slsdet/utils.py b/python/slsdet/utils.py
index 687063bda..24ba172e6 100755
--- a/python/slsdet/utils.py
+++ b/python/slsdet/utils.py
@@ -41,7 +41,7 @@ def to_geo(value):
     if isinstance(value, _slsdet.xy):
         return Geometry(x = value.x, y = value.y)
     else:
-        raise ValueError("Can only convert sls_detector.xy")
+        raise ValueError("Can only convert slsdet.xy")
 
 def all_equal(mylist):
     """If all elements are equal return true otherwise false"""