diff --git a/drivers/bmp180/bmp180.c b/drivers/bmp180/bmp180.c
index 491e77907d..6828116cdb 100644
--- a/drivers/bmp180/bmp180.c
+++ b/drivers/bmp180/bmp180.c
@@ -106,7 +106,7 @@ int bmp180_init(bmp180_t *dev, const bmp180_params_t *params)
 
 int16_t bmp180_read_temperature(const bmp180_t *dev)
 {
-    int32_t ut, b5;
+    int32_t ut = 0, b5;
     /* Acquire exclusive access */
     i2c_acquire(DEV_I2C);