diff --git a/master/fsm_eoe.c b/master/fsm_eoe.c
index 285cbd05..4788ab67 100644
--- a/master/fsm_eoe.c
+++ b/master/fsm_eoe.c
@@ -212,22 +212,26 @@ int ec_fsm_eoe_prepare_set(
     }
 
     if (req->ip_address_included) {
-        memcpy(cur, &req->ip_address, 4);
+        uint32_t swapped = htonl(req->ip_address);
+        memcpy(cur, &swapped, 4);
         cur += 4;
     }
 
     if (req->subnet_mask_included) {
-        memcpy(cur, &req->subnet_mask, 4);
+        uint32_t swapped = htonl(req->subnet_mask);
+        memcpy(cur, &swapped, 4);
         cur += 4;
     }
 
     if (req->gateway_included) {
-        memcpy(cur, &req->gateway, 4);
+        uint32_t swapped = htonl(req->gateway);
+        memcpy(cur, &swapped, 4);
         cur += 4;
     }
 
     if (req->dns_included) {
-        memcpy(cur, &req->dns, 4);
+        uint32_t swapped = htonl(req->dns);
+        memcpy(cur, &swapped, 4);
         cur += 4;
     }