diff --git a/arch/platform/zoul/dev/dht22.c b/arch/platform/zoul/dev/dht22.c
index f12859dff..0e826bfbf 100644
--- a/arch/platform/zoul/dev/dht22.c
+++ b/arch/platform/zoul/dev/dht22.c
@@ -72,7 +72,7 @@ dht22_read(void)
 {
   uint8_t i;
   uint8_t j = 0;
-  uint8_t last_state;
+  uint8_t last_state = 0xFF;
   uint8_t counter = 0;
   uint8_t checksum = 0;
 
@@ -95,7 +95,6 @@ dht22_read(void)
      * if the line is high between 70-74us the bit sent will be "1" (one).
      */
     GPIO_SET_INPUT(DHT22_PORT_BASE, DHT22_PIN_MASK);
-    last_state = GPIO_READ_PIN(DHT22_PORT_BASE, DHT22_PIN_MASK);
 
     for(i = 0; i < DHT22_MAX_TIMMING; i++) {
       counter = 0;
diff --git a/arch/platform/zoul/dev/dht22.h b/arch/platform/zoul/dev/dht22.h
index f75a96494..10adee5c3 100644
--- a/arch/platform/zoul/dev/dht22.h
+++ b/arch/platform/zoul/dev/dht22.h
@@ -90,7 +90,7 @@
 #define DHT22_COUNT             8    /**< Minimum ticks to detect a "1" bit   */
 #define DHT22_MAX_TIMMING       85   /**< Maximum ticks in a single operation */
 #define DHT22_READING_DELAY     1                                 /**< 1 us   */
-#define DHT22_READY_TIME        20                                /**< 40 us  */
+#define DHT22_READY_TIME        40                                /**< 40 us  */
 #define DHT22_START_TIME        (RTIMER_SECOND / 50)              /**< 20 ms  */
 #define DHT22_AWAKE_TIME        (RTIMER_SECOND / 4)               /**< 250 ms */
 /** @} */
diff --git a/examples/platform-specific/zoul/test-dht22.c b/examples/platform-specific/zoul/test-dht22.c
index 43048eba3..f1a49b516 100644
--- a/examples/platform-specific/zoul/test-dht22.c
+++ b/examples/platform-specific/zoul/test-dht22.c
@@ -55,7 +55,7 @@ static struct etimer et;
 /*---------------------------------------------------------------------------*/
 PROCESS_THREAD(remote_dht22_process, ev, data)
 {
-  int16_t temperature, humidity;
+  int temperature, humidity;
 
   PROCESS_BEGIN();
   SENSORS_ACTIVATE(dht22);