diff --git a/data_processing.ipynb b/data_processing.ipynb
index 2385dba..ad95637 100644
--- a/data_processing.ipynb
+++ b/data_processing.ipynb
@@ -843,6 +843,8 @@
     "\n",
     "# Select subject to show\n",
     "subject = 'sub-05'\n",
+    "os.chdir(os.path.join(path_data, subject, \"fmap\"))\n",
+    "file_mask = f\"{subject}_acq-anatCP_TB1TFL_mask-shimming.nii.gz\"\n",
     "\n",
     "# Defining crop limits for resulting figure\n",
     "xmin = 20\n",