diff --git a/ST2D_examples.ipynb b/ST2D_examples.ipynb
index 3657d191ed8ab4e143cc551cf7524ffb45db5871..3da7ae681ee8cdad792d376ecda62d3f824ba8ef 100644
--- a/ST2D_examples.ipynb
+++ b/ST2D_examples.ipynb
@@ -198,7 +198,7 @@
     }
    ],
    "source": [
-    "filename = 'example_data_2D/OCT_im_org.png';\n",
+    "filename = 'example_data_2D/oct_im_org.png';\n",
     "sigma = 0.5\n",
     "rho = 5\n",
     "N = 180 # number of angle bins for orientation histogram\n",