diff --git a/src/calng/corrections/AgipdCorrection.py b/src/calng/corrections/AgipdCorrection.py
index b6e60d9cd8152cdf422e86a792cb55e8a470595d..64c406a6365df01ef315ff990161268761583830 100644
--- a/src/calng/corrections/AgipdCorrection.py
+++ b/src/calng/corrections/AgipdCorrection.py
@@ -512,7 +512,7 @@ class AgipdBaseRunner(base_kernel_runner.BaseKernelRunner):
         if constants & bad_pixel_constants:
             self.bad_pixel_map.fill(0)
             if self.bad_pixel_subset & utils.BadPixelValues.NON_STANDARD_SIZE:
-                self._mask_asic_seams
+                self._mask_asic_seams()
 
     def _mask_asic_seams(self):
         self.bad_pixel_map[:, 64:512:64] |= utils.BadPixelValues.NON_STANDARD_SIZE.value