Error al compilar programa para detectar temepratura/humedad

Arduino:1.8.5 (Windows XP), Tarjeta:"Arduino/Genuino Uno"

In file included from C:\Documents and Settings\juan ramon\Mis documentos\Arduino\libraries\DHT_sensor_library\DHT_U.cpp:22:0:

C:\Documents and Settings\juan ramon\Mis documentos\Arduino\libraries\DHT_sensor_library\DHT_U.h:25:29: fatal error: Adafruit_Sensor.h: No such file or directory

#include <Adafruit_Sensor.h>

^

compilation terminated.

exit status 1
Error compilando para la tarjeta Arduino/Genuino Uno.

Este reporte podría tener más información con
"Mostrar salida detallada durante la compilación"
opción habilitada en Archivo -> Preferencias.

EL CÓDIGO ES:

#include <DHT.h>

int SENSOR = 2;
int temp, humedad;

DHT dht (SENSOR, DHT11);

void setup(){
Serial.begin(9600);
dht.begin();
}

void loop(){
humedad = dht.readHumidity();
temp = dht.readTemperature();
Serial.print("Temperatura: ");
Serial.print(temp);
Serial.print("ºC Humedad: ");
Serial.print(humedad);
Serial.print("%");

delay(500);
}

Adafruit_Sensor library is included by your DHT library (unfortunately, there are about a million DHT11/DHT22 libraries, all named "DHT", "DHT22" or "DHT11", but with varying interfaces, dependencies, and details), but you do not appear to have that library installed, or that library and/or the DHT library are not installed correctly.