diff --git a/src/include/lwip/apps/snmp_core.h b/src/include/lwip/apps/snmp_core.h
index d6d038bc..9e7a518c 100644
--- a/src/include/lwip/apps/snmp_core.h
+++ b/src/include/lwip/apps/snmp_core.h
@@ -91,7 +91,9 @@ extern "C" {
 #define SNMP_ASN1_TYPE_UNSIGNED32     SNMP_ASN1_TYPE_GAUGE
 #define SNMP_ASN1_TYPE_TIMETICKS      (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_TIMETICKS)
 #define SNMP_ASN1_TYPE_OPAQUE         (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_OPAQUE)
+#if LWIP_HAVE_INT64
 #define SNMP_ASN1_TYPE_COUNTER64      (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER64)
+#endif
 
 #define SNMP_VARBIND_EXCEPTION_OFFSET 0xF0
 #define SNMP_VARBIND_EXCEPTION_MASK   0x0F