diff --git a/include/ecrt.h b/include/ecrt.h
index 9a90db991c7e92f514e89e98180a4403f885682a..feda8859dc913de4b3b4dea2198ae51e60e86bb4 100644
--- a/include/ecrt.h
+++ b/include/ecrt.h
@@ -325,7 +325,7 @@ int ecrt_slave_pdo_mapping(ec_slave_t *, ec_direction_t, unsigned int, ...);
 #define EC_WRITE_U32(DATA, VAL) \
     do { \
         *((uint32_t *) (DATA)) = (uint32_t) (VAL); \
-        cpu_to_le16s(DATA); \
+        cpu_to_le32s(DATA); \
     } while (0)
 
 /**