diff --git a/src/mqtt.c b/src/mqtt.c
index 97ebc66..14cbbac 100644
--- a/src/mqtt.c
+++ b/src/mqtt.c
@@ -622,7 +622,7 @@ ssize_t __mqtt_send(struct mqtt_client *client)
 
     /* check for keep-alive */
     {
-        mqtt_pal_time_t keep_alive_timeout = client->time_of_last_send + (mqtt_pal_time_t)((float)(client->keep_alive) * 0.75);
+        mqtt_pal_time_t keep_alive_timeout = client->time_of_last_send + (mqtt_pal_time_t)((float)(client->keep_alive));
         if (MQTT_PAL_TIME() > keep_alive_timeout) {
           ssize_t rv = __mqtt_ping(client);
           if (rv != MQTT_OK) {