diff --git a/common/flatpak-run.c b/common/flatpak-run.c
index 3ec007cf..b650be46 100644
--- a/common/flatpak-run.c
+++ b/common/flatpak-run.c
@@ -1887,7 +1887,8 @@ static const ExportData default_exports[] = {
   {"XDG_RUNTIME_DIR", NULL},
 
   /* Some env vars are common enough and will affect the sandbox badly
-     if set on the host. We clear these always. */
+     if set on the host. We clear these always. If updating this list,
+     also update the list in flatpak-run.xml. */
   {"PYTHONPATH", NULL},
   {"PERLLIB", NULL},
   {"PERL5LIB", NULL},
@@ -1904,6 +1905,7 @@ static const ExportData default_exports[] = {
   {"GST_PTP_HELPER", NULL},
   {"GST_PTP_HELPER_1_0", NULL},
   {"GST_INSTALL_PLUGINS_HELPER", NULL},
+  {"KRB5CCNAME", NULL},
 };
 
 static const ExportData no_ld_so_cache_exports[] = {
diff --git a/doc/flatpak-run.xml b/doc/flatpak-run.xml
index e1aa5e1c..77cd3ad0 100644
--- a/doc/flatpak-run.xml
+++ b/doc/flatpak-run.xml
@@ -97,6 +97,7 @@
             <member>PERLLIB</member>
             <member>PERL5LIB</member>
             <member>XCURSOR_PATH</member>
+            <member>KRB5CCNAME</member>
         </simplelist>
         <para>
             Also several environment variables with the prefix "GST_" that are used by gstreamer