diff --git a/subsys/net/lib/lwm2m/lwm2m_message_handling.c b/subsys/net/lib/lwm2m/lwm2m_message_handling.c
index 6b5b95558e53..5f5b4bc85cda 100644
--- a/subsys/net/lib/lwm2m/lwm2m_message_handling.c
+++ b/subsys/net/lib/lwm2m/lwm2m_message_handling.c
@@ -1160,7 +1160,7 @@ int lwm2m_write_handler(struct lwm2m_engine_obj_inst *obj_inst, struct lwm2m_eng
 				break;
 			}
 
-			if (write_buf_len == sizeof(time_t)) {
+			if (write_buf_len >= sizeof(time_t)) {
 				*(time_t *)write_buf = temp_time;
 				len = sizeof(time_t);
 			} else if (write_buf_len == sizeof(uint32_t)) {