diff --git a/net/modemmanager/Makefile b/net/modemmanager/Makefile
index 996f1885d..8a4958404 100644
--- a/net/modemmanager/Makefile
+++ b/net/modemmanager/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=modemmanager
 PKG_SOURCE_VERSION:=1.20.6
-PKG_RELEASE:=7
+PKG_RELEASE:=8
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://gitlab.freedesktop.org/mobile-broadband/ModemManager.git
diff --git a/net/modemmanager/files/modemmanager.proto b/net/modemmanager/files/modemmanager.proto
index a0f6c357e..b8ebce924 100755
--- a/net/modemmanager/files/modemmanager.proto
+++ b/net/modemmanager/files/modemmanager.proto
@@ -350,6 +350,15 @@ proto_modemmanager_init_config() {
 	proto_config_add_defaults
 }
 
+# Append param to the global 'connectargs' variable.
+append_param() {
+	local param="$1"
+
+	[ -z "$param" ] && return
+	[ -z "$connectargs" ] || connectargs="${connectargs},"
+	connectargs="${connectargs}${param}"
+}
+
 proto_modemmanager_setup() {
 	local interface="$1"
 
@@ -401,7 +410,16 @@ proto_modemmanager_setup() {
 		# allowed unless a user set the opposite
 		allow_roaming="yes"
 	fi
-	connectargs="apn=${apn},allow-roaming=${allow_roaming}${iptype:+,ip-type=${iptype}}${plmn:+,operator-id=${plmn}}${cliauth:+,allowed-auth=${cliauth}}${username:+,user=${username}}${password:+,password=${password}}${pincode:+,pin=${pincode}}"
+
+	# Append options to 'connectargs' variable
+	append_param "apn=${apn}"
+	append_param "allow-roaming=${allow_roaming}"
+	append_param "${iptype:+ip-type=${iptype}}"
+	append_param "${plmn:+operator-id=${plmn}}"
+	append_param "${cliauth:+allowed-auth=${cliauth}}"
+	append_param "${username:+user=${username}}"
+	append_param "${password:+password=${password}}"
+	append_param "${pincode:+pin=${pincode}}"
 
 	mmcli --modem="${device}" --timeout 120 --simple-connect="${connectargs}" || {
 		proto_notify_error "${interface}" MM_CONNECT_FAILED