diff --git a/src/plugins/fset/fset-command.c b/src/plugins/fset/fset-command.c
index f22af499d..3a64b7ff2 100644
--- a/src/plugins/fset/fset-command.c
+++ b/src/plugins/fset/fset-command.c
@@ -702,7 +702,9 @@ fset_command_init (void)
             N_("> `xxx`: show only options with \"xxx\" in name"),
             N_("> `f:xxx`: show only configuration file \"xxx\""),
             N_("> `t:xxx`: show only type \"xxx\" (bool/int/str/col/enum "
-               "or boolean/integer/string/color/enum)"),
+               "or boolean/integer/string/color/enum); the special value "
+               "\"themable\" matches all options with the themable flag, "
+               "regardless of type"),
             N_("> `d`: show only changed options"),
             N_("> `d:xxx`: show only changed options with \"xxx\" in "
                "name"),
diff --git a/src/plugins/fset/fset-option.c b/src/plugins/fset/fset-option.c
index 2c5a874f8..135a5f478 100644
--- a/src/plugins/fset/fset-option.c
+++ b/src/plugins/fset/fset-option.c
@@ -335,6 +335,10 @@ fset_option_match_filter (struct t_fset_option *fset_option, const char *filter)
     }
     else if (strncmp (filter, "t:", 2) == 0)
     {
+        /* virtual cross-type value: match themable flag (any option type) */
+        if (weechat_strcasecmp (filter + 2, "themable") == 0)
+            return (fset_option->themable) ? 1 : 0;
+
         /* filter by type */
         return (
             (weechat_strcasecmp (
@@ -426,7 +430,7 @@ fset_option_set_values (struct t_fset_option *fset_option,
     const char **ptr_string_values;
     void *ptr_default_value, *ptr_value;
     struct t_config_option *ptr_parent_option;
-    int *ptr_type, *ptr_min, *ptr_max;
+    int *ptr_type, *ptr_themable, *ptr_min, *ptr_max;
     char str_value[64], str_allowed_values[4096];
 
     /* file */
@@ -466,6 +470,10 @@ fset_option_set_values (struct t_fset_option *fset_option,
     ptr_type = weechat_config_option_get_pointer (option, "type");
     fset_option->type = *ptr_type;
 
+    /* themable */
+    ptr_themable = weechat_config_option_get_pointer (option, "themable");
+    fset_option->themable = (ptr_themable) ? *ptr_themable : 0;
+
     /* default value */
     free (fset_option->default_value);
     fset_option->default_value = NULL;
@@ -784,6 +792,7 @@ fset_option_alloc (struct t_config_option *option)
     new_fset_option->name = NULL;
     new_fset_option->parent_name = NULL;
     new_fset_option->type = 0;
+    new_fset_option->themable = 0;
     new_fset_option->default_value = NULL;
     new_fset_option->value = NULL;
     new_fset_option->parent_value = NULL;
@@ -1691,6 +1700,7 @@ fset_option_hdata_option_cb (const void *pointer, void *data,
         WEECHAT_HDATA_VAR(struct t_fset_option, name, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_fset_option, parent_name, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_fset_option, type, INTEGER, 0, NULL, NULL);
+        WEECHAT_HDATA_VAR(struct t_fset_option, themable, INTEGER, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_fset_option, default_value, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_fset_option, value, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_fset_option, parent_value, STRING, 0, NULL, NULL);
@@ -1740,6 +1750,8 @@ fset_option_add_to_infolist (struct t_infolist *infolist,
         return 0;
     if (!weechat_infolist_new_var_string (ptr_item, "type_en", fset_option_type_string[fset_option->type]))
         return 0;
+    if (!weechat_infolist_new_var_integer (ptr_item, "themable", fset_option->themable))
+        return 0;
     if (!weechat_infolist_new_var_string (ptr_item, "default_value", fset_option->default_value))
         return 0;
     if (!weechat_infolist_new_var_string (ptr_item, "value", fset_option->value))
@@ -1793,6 +1805,7 @@ fset_option_print_log (void)
         weechat_log_printf ("  type. . . . . . . . . : %d ('%s')",
                             ptr_fset_option->type,
                             fset_option_type_string[ptr_fset_option->type]);
+        weechat_log_printf ("  themable. . . . . . . : %d", ptr_fset_option->themable);
         weechat_log_printf ("  default_value . . . . : '%s'", ptr_fset_option->default_value);
         weechat_log_printf ("  value . . . . . . . . : '%s'", ptr_fset_option->value);
         weechat_log_printf ("  parent_value. . . . . : '%s'", ptr_fset_option->parent_value);
diff --git a/src/plugins/fset/fset-option.h b/src/plugins/fset/fset-option.h
index 8ad377eb2..0a0cce96a 100644
--- a/src/plugins/fset/fset-option.h
+++ b/src/plugins/fset/fset-option.h
@@ -46,6 +46,7 @@ struct t_fset_option
     char *name;                          /* option full name: file.sect.opt */
     char *parent_name;                   /* parent option name              */
     enum t_fset_option_type type;        /* option type                     */
+    int themable;                        /* 1 if option is themable         */
     char *default_value;                 /* option default value            */
     char *value;                         /* option value                    */
     char *parent_value;                  /* parent option value             */