diff --git a/ogclient/functions/ogBootLoaderSetTheme b/ogclient/functions/ogBootLoaderSetTheme
new file mode 100755
index 0000000..09df864
--- /dev/null
+++ b/ogclient/functions/ogBootLoaderSetTheme
@@ -0,0 +1,25 @@
+#!/usr/bin/python3
+
+import sys
+import argparse
+import ogGlobals
+from SystemLib import ogHelp
+from BootLib import ogBootLoaderSetTheme
+
+parser = argparse.ArgumentParser (add_help=False)
+parser.add_argument ('disk')
+parser.add_argument ('par')
+parser.add_argument ('theme')
+
+if 2 == len (sys.argv) and 'help' == sys.argv[1]:
+    #parser.print_help() sale en inglés aunque la locale indique otra cosa
+    ogHelp ('ogBootLoaderSetTheme', ogGlobals.lang.MSG_SEE+' ogGrubSetTheme', [])
+    sys.exit (0)
+
+args = parser.parse_args()
+ret = ogBootLoaderSetTheme (args.disk, args.par, args.theme)
+
+if ret is not None:
+    if   ret == True: sys.exit (0)
+    elif ret == False: sys.exit (1)
+    else: print (ret)
diff --git a/ogclient/functions/ogGrubSetTheme b/ogclient/functions/ogGrubSetTheme
new file mode 100755
index 0000000..86c0590
--- /dev/null
+++ b/ogclient/functions/ogGrubSetTheme
@@ -0,0 +1,24 @@
+#!/usr/bin/python3
+
+import sys
+import argparse
+from SystemLib import ogHelp
+from BootLib import ogGrubSetTheme
+
+parser = argparse.ArgumentParser (add_help=False)
+parser.add_argument ('disk')
+parser.add_argument ('par')
+parser.add_argument ('theme')
+
+if 2 == len (sys.argv) and 'help' == sys.argv[1]:
+    #parser.print_help() sale en inglés aunque la locale indique otra cosa
+    ogHelp ('ogGrubSetTheme', 'ogGrubSetTheme int_ndiskSecondStage int_partitionSecondStage str_themeName', ['ogGrubSetTheme 1 4 ThemeBasic'])
+    sys.exit (0)
+
+args = parser.parse_args()
+ret = ogGrubSetTheme (args.disk, args.par, args.theme)
+
+if ret is not None:
+    if   ret == True: sys.exit (0)
+    elif ret == False: sys.exit (1)
+    else: print (ret)
diff --git a/ogclient/lib/python3/BootLib.py b/ogclient/lib/python3/BootLib.py
index 6f0a1ca..9a9c5b8 100644
--- a/ogclient/lib/python3/BootLib.py
+++ b/ogclient/lib/python3/BootLib.py
@@ -1061,6 +1061,8 @@ def ogBootLoaderOgliveDefaultEntry (disk, par):
 #@brief ver ogBootLoaderSetTheme
 #@see ogBootLoaderSetTheme
 #*/ ##
+def ogGrubSetTheme (disk, par, theme):
+    return ogBootLoaderSetTheme (disk, par, theme)
 
 
 #/**
@@ -1077,6 +1079,23 @@ def ogBootLoaderOgliveDefaultEntry (disk, par):
 #@exception OG_ERR_NOTFOUND  Fichero de configuración del tema no encontrado: theme.conf (sólo refind).
 #@note    El tema debe situarse en OGLIB/BOOTLOADER/themes
 #*/ ##
+def ogBootLoaderSetTheme (disk, par, theme):
+# Nombre de la función que llama a esta.
+    func = inspect.stack()[1][3]
+
+# Error si no puede montar sistema de archivos.
+    PART = FileSystemLib.ogMount (disk, par)
+    if not PART: return None
+# La función debe ser llamanda desde ogGrubSetTheme, ogBurgSetTheme or ogRefindSetTheme.
+    if 'ogGrubSetTheme' == func:
+        bootloader = 'grub'
+        bootloaderdir = 'boot/grubMBR'
+        cfgfile = f'{PART}/boot/grubMBR/boot/grub/grub.cfg'
+        SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_FORMAT, 'ogGrubSetTheme not sopported')
+        return None
+    else:
+        SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_FORMAT, f'Use ogGrubOgliveDefaultEntry')
+        return None
 
 #/**
 # ogGrubSetAdminKeys num_disk num_part str_theme