diff --git a/source/blender/compositor/operations/COM_MaskOperation.cc b/source/blender/compositor/operations/COM_MaskOperation.cc
index 3d9d1b0eb77..9496f153490 100644
--- a/source/blender/compositor/operations/COM_MaskOperation.cc
+++ b/source/blender/compositor/operations/COM_MaskOperation.cc
@@ -84,7 +84,7 @@ void MaskOperation::deinit_execution()
 
 void MaskOperation::determine_canvas(const rcti &preferred_area, rcti &r_area)
 {
-  if (mask_width_ == 0 || mask_height_ == 0) {
+  if (!mask_ || mask_width_ == 0 || mask_height_ == 0) {
     r_area = COM_AREA_NONE;
   }
   else {