diff --git a/hexrd/ui/create_raw_mask.py b/hexrd/ui/create_raw_mask.py
index 22d5bc6b7..9bb59b7d2 100644
--- a/hexrd/ui/create_raw_mask.py
+++ b/hexrd/ui/create_raw_mask.py
@@ -22,6 +22,7 @@ def apply_threshold_mask():
                 masks[idx] = mask
             results[det] = masks
     HexrdConfig().threshold_masks = results
+    HexrdConfig().threshold_mask_changed.emit('threshold')
 
 
 def create_threshold_mask(img):
diff --git a/hexrd/ui/threshold_mask_dialog.py b/hexrd/ui/threshold_mask_dialog.py
index 29ac414c4..fe17859c8 100644
--- a/hexrd/ui/threshold_mask_dialog.py
+++ b/hexrd/ui/threshold_mask_dialog.py
@@ -66,5 +66,4 @@ def accept(self):
         self.gather_input()
         HexrdConfig().threshold_values = self.values
         apply_threshold_mask()
-        HexrdConfig().threshold_mask_changed.emit('threshold')
         self.mask_applied.emit()