}
 }
 
+#define put_vci(e, str)                                                \
+       do {                                                    \
+               size_t vci_strlen = strlen(str);                \
+               *e++ = 60;      /* Vendor Class Identifier */   \
+               *e++ = vci_strlen;                              \
+               memcpy(e, str, vci_strlen);                     \
+               e += vci_strlen;                                \
+       } while (0)
+
 /*
  *     Initialize BOOTP extension fields in the request.
  */
        u8 *cnt;
 #if defined(CONFIG_BOOTP_PXE)
        char *uuid;
-       size_t vci_strlen;
        u16 clientarch;
 #endif
 
                        printf("Invalid pxeuuid: %s\n", uuid);
                }
        }
+#endif
 
-       *e++ = 60;      /* Vendor Class Identifier */
-       vci_strlen = strlen(CONFIG_BOOTP_VCI_STRING);
-       *e++ = vci_strlen;
-       memcpy(e, CONFIG_BOOTP_VCI_STRING, vci_strlen);
-       e += vci_strlen;
+#ifdef CONFIG_BOOTP_VCI_STRING
+       put_vci(e, CONFIG_BOOTP_VCI_STRING);
 #endif
 
 #if defined(CONFIG_BOOTP_VENDOREX)
        *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
 #endif
 
+#ifdef CONFIG_BOOTP_VCI_STRING
+       put_vci(e, CONFIG_BOOTP_VCI_STRING);
+#endif
+
 #if defined(CONFIG_BOOTP_SUBNETMASK)
        *e++ = 1;               /* Subnet mask request */
        *e++ = 4;