diff --git a/blockheader.go b/blockheader.go
index 9eb643e6..d04d83b3 100644
--- a/blockheader.go
+++ b/blockheader.go
@@ -89,11 +89,13 @@ func (h *BlockHeader) Serialize(w io.Writer) error {
 func NewBlockHeader(prevHash *ShaHash, merkleRootHash *ShaHash, bits uint32,
 	nonce uint32) *BlockHeader {
 
+	// Limit the timestamp to one second precision since the protocol
+	// doesn't support better.
 	return &BlockHeader{
 		Version:    BlockVersion,
 		PrevBlock:  *prevHash,
 		MerkleRoot: *merkleRootHash,
-		Timestamp:  time.Now(),
+		Timestamp:  time.Unix(time.Now().Unix(), 0),
 		Bits:       bits,
 		Nonce:      nonce,
 	}
diff --git a/msgversion.go b/msgversion.go
index c8ac391b..6b215759 100644
--- a/msgversion.go
+++ b/msgversion.go
@@ -176,7 +176,7 @@ func (msg *MsgVersion) MaxPayloadLength(pver uint32) uint32 {
 func NewMsgVersion(me *NetAddress, you *NetAddress, nonce uint64,
 	userAgent string, lastBlock int32) *MsgVersion {
 
-	// Limit the Timestamp to millisecond precision since the protocol
+	// Limit the timestamp to one second precision since the protocol
 	// doesn't support better.
 	return &MsgVersion{
 		ProtocolVersion: int32(ProtocolVersion),
diff --git a/netaddress.go b/netaddress.go
index 8d060f8e..f4017111 100644
--- a/netaddress.go
+++ b/netaddress.go
@@ -75,8 +75,10 @@ func (na *NetAddress) SetAddress(ip net.IP, port uint16) {
 // NewNetAddressIPPort returns a new NetAddress using the provided IP, port, and
 // supported services with defaults for the remaining fields.
 func NewNetAddressIPPort(ip net.IP, port uint16, services ServiceFlag) *NetAddress {
+	// Limit the timestamp to one second precision since the protocol
+	// doesn't support better.
 	na := NetAddress{
-		Timestamp: time.Now(),
+		Timestamp: time.Unix(time.Now().Unix(), 0),
 		Services:  services,
 		IP:        ip,
 		Port:      port,