diff --git a/dns.go b/dns.go
index 596dc4eb..e0a3ee28 100644
--- a/dns.go
+++ b/dns.go
@@ -105,12 +105,12 @@ func (e *Error) Error() string {
 
 // An RR represents a resource record.
 type RR interface {
-        // Header returns the header of an resource record. The header contains
-        // everything up to the rdata.
+	// Header returns the header of an resource record. The header contains
+	// everything up to the rdata.
 	Header() *RR_Header
-        // String returns the text representation of the resource record.
+	// String returns the text representation of the resource record.
 	String() string
-        // Len returns the length (in octects) of the uncompressed RR in wire format.
+	// Len returns the length (in octects) of the uncompressed RR in wire format.
 	Len() int
 }
 
@@ -149,7 +149,7 @@ func (h *RR_Header) String() string {
 	} else {
 		s += h.Name + "\t"
 	}
-	s = s + strconv.Itoa(int(h.Ttl)) + "\t"
+	s = s + strconv.FormatInt(int64(h.Ttl), 10) + "\t"
 
 	if _, ok := Class_str[h.Class]; ok {
 		s += Class_str[h.Class] + "\t"
diff --git a/parse_test.go b/parse_test.go
index 1c965302..8dec4641 100644
--- a/parse_test.go
+++ b/parse_test.go
@@ -421,3 +421,11 @@ b1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D
                 fmt.Printf("%s\n", hip.String())
         }
 }
+
+// example.com.	1000	IN	SOA	master.example.com. admin.example.com. 1 4294967294 4294967293 4294967295 100
+func ExampleSOA() {
+        s := "example.com. 1000 SOA master.example.com. admin.example.com. 1 4294967294 4294967293 4294967295 100"
+        if soa, err := NewRR(s); err == nil {
+                fmt.Printf("%s\n", soa.String())
+        }
+}
diff --git a/types.go b/types.go
index 25b10865..3616cbe5 100644
--- a/types.go
+++ b/types.go
@@ -359,11 +359,11 @@ func (rr *RR_SOA) Header() *RR_Header {
 
 func (rr *RR_SOA) String() string {
 	return rr.Hdr.String() + rr.Ns + " " + rr.Mbox +
-		" " + strconv.Itoa(int(rr.Serial)) +
-		" " + strconv.Itoa(int(rr.Refresh)) +
-		" " + strconv.Itoa(int(rr.Retry)) +
-		" " + strconv.Itoa(int(rr.Expire)) +
-		" " + strconv.Itoa(int(rr.Minttl))
+		" " + strconv.FormatInt(int64(rr.Serial), 10) +
+		" " + strconv.FormatInt(int64(rr.Refresh), 10) +
+		" " + strconv.FormatInt(int64(rr.Retry), 10) +
+		" " + strconv.FormatInt(int64(rr.Expire), 10) +
+		" " + strconv.FormatInt(int64(rr.Minttl), 10)
 }
 
 func (rr *RR_SOA) Len() int {
@@ -605,7 +605,7 @@ func (rr *RR_RRSIG) String() string {
 	return rr.Hdr.String() + Rr_str[rr.TypeCovered] +
 		" " + strconv.Itoa(int(rr.Algorithm)) +
 		" " + strconv.Itoa(int(rr.Labels)) +
-		" " + strconv.Itoa(int(rr.OrigTtl)) +
+		" " + strconv.FormatInt(int64(rr.OrigTtl), 10) +
 		" " + timeToDate(rr.Expiration) +
 		" " + timeToDate(rr.Inception) +
 		" " + strconv.Itoa(int(rr.KeyTag)) +