diff --git a/etc/config.csh/unset b/etc/config.csh/unset
index 86e06808e3..648b207434 100644
--- a/etc/config.csh/unset
+++ b/etc/config.csh/unset
@@ -109,6 +109,7 @@ unsetenv MPI_ARCH_PATH
 unsetenv MPI_BUFFER_SIZE
 unsetenv OPAL_PREFIX
 
+
 #------------------------------------------------------------------------------
 # Unset Ensight/ParaView-related environment variables
 
@@ -121,6 +122,12 @@ unsetenv ParaView_VERSION
 unsetenv PV_PLUGIN_PATH
 
 
+#------------------------------------------------------------------------------
+# Unset CGAL-related environment variables
+
+unsetenv CGAL_ARCH_PATH
+
+
 #------------------------------------------------------------------------------
 # Cleanup environment
 # PATH, LD_LIBRARY_PATH, MANPATH
diff --git a/etc/config.sh/unset b/etc/config.sh/unset
index 0023fded3f..92309add81 100644
--- a/etc/config.sh/unset
+++ b/etc/config.sh/unset
@@ -103,6 +103,7 @@ unset MPI_ARCH_PATH
 unset MPI_BUFFER_SIZE
 unset OPAL_PREFIX
 
+
 #------------------------------------------------------------------------------
 # Unset Ensight/ParaView-related environment variables
 
@@ -115,6 +116,12 @@ unset ParaView_VERSION
 unset PV_PLUGIN_PATH
 
 
+#------------------------------------------------------------------------------
+# Unset CGAL-related environment variables
+
+unset CGAL_ARCH_PATH
+
+
 #------------------------------------------------------------------------------
 # Cleanup environment
 # PATH, LD_LIBRARY_PATH, MANPATH