diff --git a/notebooks/ProjectExamples/customizeCase_PRISM.ipynb b/notebooks/ProjectExamples/customizeCase_PRISM.ipynb
index b6ffbd9..ec44893 100644
--- a/notebooks/ProjectExamples/customizeCase_PRISM.ipynb
+++ b/notebooks/ProjectExamples/customizeCase_PRISM.ipynb
@@ -185,7 +185,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "diff env_run.xml ../${neon_site}.PRISM.transient/env_run.xml "
+    "diff ../${neon_site}.transient/env_run.xml ../${neon_site}.PRISM.transient/env_run.xml"
    ]
   },
   {