diff --git a/reader/JFJochHDF5Reader.cpp b/reader/JFJochHDF5Reader.cpp
index 8da235cb..d5599612 100644
--- a/reader/JFJochHDF5Reader.cpp
+++ b/reader/JFJochHDF5Reader.cpp
@@ -583,6 +583,12 @@ void JFJochHDF5Reader::ReadFile(const std::string &filename) {
                 {0, 0},
                 {image_size_y, image_size_x}
             );
+            if (mask_tmp.empty())
+                mask_tmp = master_file->ReadOptVector<uint32_t>(
+                "/entry/instrument/detector/detectorSpecific/pixel_mask",
+                {0, 0},
+                {image_size_y, image_size_x}
+            );
             if (mask_tmp.empty())
                 mask_tmp = std::vector<uint32_t>(image_size_x * image_size_y);
             dataset->pixel_mask = PixelMask(mask_tmp);