diff --git a/process/build.py b/process/build.py
index 6fbf46c546..b5b3dbfe76 100644
--- a/process/build.py
+++ b/process/build.py
@@ -767,6 +767,13 @@ def cryostat_output(self, output: bool) -> None:
                 build_variables.dr_cryostat,
                 "OP ",
             )
+            po.ovarrf(
+                self.outfile,
+                "Cryostat internal radius (m)",
+                "(r_cryostat_inboard)",
+                fwbs_variables.r_cryostat_inboard,
+                "OP ",
+            )
             po.ovarrf(
                 self.outfile,
                 "Cryostat intenral half height (m)",
diff --git a/process/io/obsolete_vars.py b/process/io/obsolete_vars.py
index 57f1fd10ce..bd7816bec6 100644
--- a/process/io/obsolete_vars.py
+++ b/process/io/obsolete_vars.py
@@ -159,6 +159,10 @@
     "rnbeam": "f_nd_beam_electron",
     "ralpne": "f_nd_alpha_electron",
     "protium": "f_nd_protium_electrons",
+    "clhsf": "f_z_cryostat",
+    "ddwex": "dr_cryostat",
+    "clh1": "dz_tf_cryostat",
+    "rpf2dewar": "dr_pf_cryostat",
 }
 
 OBS_VARS_HELP = {