diff --git a/src/mgos_i2c.c b/src/mgos_i2c.c
index ee2146d..ad976c7 100644
--- a/src/mgos_i2c.c
+++ b/src/mgos_i2c.c
@@ -102,7 +102,7 @@ int mgos_i2c_read_reg_w(struct mgos_i2c *i2c, uint16_t addr, uint8_t reg) {
 
   if (!mgos_i2c_read_reg_n(i2c, addr, reg, 2, data))
     return -1;
-  value=(data[1]<<8)+data[0];
+  value=(data[0]<<8)+data[1];
   return value;
 }