diff --git a/CHANGELOG b/CHANGELOG
index fac5ed4..53ffc35 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -18,6 +18,7 @@
 - fix wildcard map handling and improve nsswitch source map re-reading.
 - fix "null" domain netgroup match for "-hosts" map.
 - update kernel patches.
+- add configuration variable to control appending of global options.
 
 20/2/2007 autofs-5.0.1
 ----------------------
diff --git a/include/defaults.h b/include/defaults.h
index b64735f..ef58467 100644
--- a/include/defaults.h
+++ b/include/defaults.h
@@ -34,6 +34,7 @@
 #define DEFAULT_ENTRY_ATTR		"cn"
 #define DEFAULT_VALUE_ATTR		"nisMapEntry"
 
+#define DEFAULT_APPEND_OPTIONS		1
 #define DEFAULT_AUTH_CONF_FILE		AUTOFS_MAP_DIR "/autofs_ldap_auth.conf"
 
 unsigned int defaults_read_config(void);
@@ -47,6 +48,7 @@ const char *defaults_get_entry_obj_class(void);
 const char *defaults_get_map_attr(void);
 const char *defaults_get_entry_attr(void);
 const char *defaults_get_value_attr(void);
+unsigned int defaults_get_append_options(void);
 const char *defaults_get_auth_conf_file(void);
 
 #endif
diff --git a/lib/defaults.c b/lib/defaults.c
index f76478e..4b4acba 100644
--- a/lib/defaults.c
+++ b/lib/defaults.c
@@ -37,6 +37,7 @@
 #define ENV_NAME_ENTRY_ATTR		"ENTRY_ATTRIBUTE"
 #define ENV_NAME_VALUE_ATTR		"VALUE_ATTRIBUTE"
 
+#define ENV_APPEND_OPTIONS		"APPEND_OPTIONS"
 #define ENV_AUTH_CONF_FILE		"AUTH_CONF_FILE"
 
 static const char *default_master_map_name = DEFAULT_MASTER_MAP_NAME;
@@ -200,6 +201,7 @@ unsigned int defaults_read_config(void)
 		    check_set_config_value(res, ENV_NAME_MAP_ATTR, value) ||
 		    check_set_config_value(res, ENV_NAME_ENTRY_ATTR, value) ||
 		    check_set_config_value(res, ENV_NAME_VALUE_ATTR, value) ||
+		    check_set_config_value(res, ENV_APPEND_OPTIONS, value) ||
 		    check_set_config_value(res, ENV_AUTH_CONF_FILE, value))
 			;
 	}
@@ -338,6 +340,17 @@ const char *defaults_get_value_attr(void)
 	return (const char *) va;
 }
 
+unsigned int defaults_get_append_options(void)
+{
+	int res;
+
+	res = get_env_yesno(ENV_APPEND_OPTIONS);
+	if (res < 0)
+		res = DEFAULT_APPEND_OPTIONS;
+
+	return res;
+}
+
 const char *defaults_get_auth_conf_file(void)
 {
 	char *cf;
diff --git a/modules/parse_sun.c b/modules/parse_sun.c
index 9323e7c..276493a 100644
--- a/modules/parse_sun.c
+++ b/modules/parse_sun.c
@@ -140,7 +140,7 @@ int expandsunent(const char *src, char *dst, const char *key,
 			 * re preserved, we need to escape them here.
 			 */
 			if (strchr(key, ' ')) {
-				char *keyp = key;
+				const char *keyp = key;
 				while (*keyp) {
 					if (isspace(*keyp)) {
 						if (dst) {
@@ -953,6 +953,7 @@ int parse_mount(struct autofs_point *ap, const char *name,
 	int mapent_len, rv = 0;
 	int optlen, cur_state;
 	int slashify = ctxt->slashify_colons;
+	unsigned int append_options;
 
 	source = ap->entry->current;
 	ap->entry->current = NULL;
@@ -998,6 +999,7 @@ int parse_mount(struct autofs_point *ap, const char *name,
 
 	debug(ap->logopt, MODPREFIX "expanded entry: %s", pmapent);
 
+	append_options = defaults_get_append_options();
 	options = strdup(ctxt->optstr ? ctxt->optstr : "");
 	if (!options) {
 		char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
@@ -1010,10 +1012,10 @@ int parse_mount(struct autofs_point *ap, const char *name,
 
 	/* Deal with 0 or more options */
 	if (*p == '-') {
-		char *mnt_options = NULL;
+		char *tmp, *mnt_options = NULL;
 
 		do {
-			char *tmp, *noptions = NULL;
+			char *noptions = NULL;
 
 			p = parse_options(p, &noptions, ap->logopt);
 			tmp = concat_options(mnt_options, noptions);
@@ -1033,10 +1035,25 @@ int parse_mount(struct autofs_point *ap, const char *name,
 			p = skipspace(p);
 		} while (*p == '-');
 
-		if (options)
+		if (options && !append_options) {
 			free(options);
+			options = NULL;
+		}
 
-		options = mnt_options;
+		if (append_options) {
+			tmp = concat_options(options, mnt_options);
+			if (!tmp) {
+				char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
+				error(ap->logopt, MODPREFIX "concat_options: %s", estr);
+				if (options)
+					free(options);
+				if (mnt_options)
+					free(mnt_options);
+				return 1;
+			}
+			options = tmp;
+		} else
+			options = mnt_options;
 	}
 
 	debug(ap->logopt, MODPREFIX "gathered options: %s", options);
diff --git a/redhat/autofs.sysconfig.in b/redhat/autofs.sysconfig.in
index 84d524b..8299b55 100644
--- a/redhat/autofs.sysconfig.in
+++ b/redhat/autofs.sysconfig.in
@@ -13,6 +13,10 @@ TIMEOUT=300
 #
 BROWSE_MODE="no"
 #
+# APPEND_OPTIONS - append to global options instead of replace.
+#
+#APPEND_OPTIONS="yes"
+#
 # LOGGING - set default log level "none", "verbose" or "debug"
 #
 #LOGGING="none"
diff --git a/samples/autofs.conf.default.in b/samples/autofs.conf.default.in
index 84d524b..8299b55 100644
--- a/samples/autofs.conf.default.in
+++ b/samples/autofs.conf.default.in
@@ -13,6 +13,10 @@ TIMEOUT=300
 #
 BROWSE_MODE="no"
 #
+# APPEND_OPTIONS - append to global options instead of replace.
+#
+#APPEND_OPTIONS="yes"
+#
 # LOGGING - set default log level "none", "verbose" or "debug"
 #
 #LOGGING="none"