{ "include", "file", 2, 2, 0, ARG_MAGIC,
                &config_include, "( OLcfgGlAt:19 NAME 'olcInclude' "
                        "SUP labeledURI )", NULL, NULL },
-       { "index_substr_if_minlen", "min", 2, 2, 0, ARG_INT|ARG_NONZERO|ARG_MAGIC|CFG_SSTR_IF_MIN,
+       { "index_substr_if_minlen", "min", 2, 2, 0, ARG_UINT|ARG_NONZERO|ARG_MAGIC|CFG_SSTR_IF_MIN,
                &config_generic, "( OLcfgGlAt:20 NAME 'olcIndexSubstrIfMinLen' "
                        "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
-       { "index_substr_if_maxlen", "max", 2, 2, 0, ARG_INT|ARG_NONZERO|ARG_MAGIC|CFG_SSTR_IF_MAX,
+       { "index_substr_if_maxlen", "max", 2, 2, 0, ARG_UINT|ARG_NONZERO|ARG_MAGIC|CFG_SSTR_IF_MAX,
                &config_generic, "( OLcfgGlAt:21 NAME 'olcIndexSubstrIfMaxLen' "
                        "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
        { "index_substr_any_len", "len", 2, 2, 0, ARG_INT|ARG_NONZERO,
                        c->value_int = (SLAP_DBMONITORING(c->be) != 0);
                        break;
                case CFG_SSTR_IF_MAX:
-                       c->value_int = index_substr_if_maxlen;
+                       c->value_uint = index_substr_if_maxlen;
                        break;
                case CFG_SSTR_IF_MIN:
-                       c->value_int = index_substr_if_minlen;
+                       c->value_uint = index_substr_if_minlen;
                        break;
                case CFG_IX_INTLEN:
                        c->value_int = index_intlen;
                        break;
 
                case CFG_SSTR_IF_MAX:
-                       if (c->value_int < index_substr_if_minlen) {
+                       if (c->value_uint < index_substr_if_minlen) {
                                snprintf( c->cr_msg, sizeof( c->cr_msg ), "<%s> invalid value", c->argv[0] );
                                Debug(LDAP_DEBUG_ANY, "%s: %s (%d)\n",
                                        c->log, c->cr_msg, c->value_int );
                                return(1);
                        }
-                       index_substr_if_maxlen = c->value_int;
+                       index_substr_if_maxlen = c->value_uint;
                        break;
 
                case CFG_SSTR_IF_MIN:
-                       if (c->value_int > index_substr_if_maxlen) {
+                       if (c->value_uint > index_substr_if_maxlen) {
                                snprintf( c->cr_msg, sizeof( c->cr_msg ), "<%s> invalid value", c->argv[0] );
                                Debug(LDAP_DEBUG_ANY, "%s: %s (%d)\n",
                                        c->log, c->cr_msg, c->value_int );
                                return(1);
                        }
-                       index_substr_if_minlen = c->value_int;
+                       index_substr_if_minlen = c->value_uint;
                        break;
 
 #ifdef SLAPD_MODULES