diff --git a/src/stkutil.c b/src/stkutil.c
index 6a2fbfb1..46ce4cb7 100644
--- a/src/stkutil.c
+++ b/src/stkutil.c
@@ -3208,6 +3208,8 @@ unsigned int stk_pdu_from_response(const struct stk_response *response,
 					&response->get_input.text,
 					NULL);
 		break;
+	case STK_COMMAND_TYPE_SEND_SMS:
+		break;
 	default:
 		return 0;
 	};
diff --git a/src/stkutil.h b/src/stkutil.h
index 4e46cd53..a98d677f 100644
--- a/src/stkutil.h
+++ b/src/stkutil.h
@@ -1026,6 +1026,7 @@ struct stk_response {
 		struct stk_response_generic display_text;
 		struct stk_response_get_inkey get_inkey;
 		struct stk_response_get_input get_input;
+		struct stk_response_generic send_sms;
 	};
 
 	void (*destructor)(struct stk_response *response);