diff --git a/src/includes/functions.inc.php b/src/includes/functions.inc.php
index dde0f585..c43bda98 100644
--- a/src/includes/functions.inc.php
+++ b/src/includes/functions.inc.php
@@ -578,6 +578,9 @@ function psm_build_sms() {
 		case 'twilio':
 			$sms = new \psm\Txtmsg\Twilio();
 			break;
+		case 'gatewayapi':
+			$sms = new \psm\Txtmsg\GatewayAPI();
+			break;
 	}
 
 	// copy login information from the config file