diff --git a/chaincfg/params.go b/chaincfg/params.go
index 8c33ea893..f47d6da06 100644
--- a/chaincfg/params.go
+++ b/chaincfg/params.go
@@ -201,9 +201,11 @@ type Params struct {
 	Bech32HRPSegwit string
 
 	// Address encoding magics
-	PubKeyHashAddrID byte // First byte of a P2PKH address
-	ScriptHashAddrID byte // First byte of a P2SH address
-	PrivateKeyID     byte // First byte of a WIF private key
+	PubKeyHashAddrID        byte // First byte of a P2PKH address
+	ScriptHashAddrID        byte // First byte of a P2SH address
+	PrivateKeyID            byte // First byte of a WIF private key
+	WitnessPubKeyHashAddrID byte // First byte of a P2WPKH address
+	WitnessScriptHashAddrID byte // First byte of a P2WSH address
 
 	// BIP32 hierarchical deterministic extended key magics
 	HDPrivateKeyID [4]byte
@@ -294,9 +296,11 @@ var MainNetParams = Params{
 	Bech32HRPSegwit: "bc", // always bc for main net
 
 	// Address encoding magics
-	PubKeyHashAddrID: 0x00, // starts with 1
-	ScriptHashAddrID: 0x05, // starts with 3
-	PrivateKeyID:     0x80, // starts with 5 (uncompressed) or K (compressed)
+	PubKeyHashAddrID:        0x00, // starts with 1
+	ScriptHashAddrID:        0x05, // starts with 3
+	PrivateKeyID:            0x80, // starts with 5 (uncompressed) or K (compressed)
+	WitnessPubKeyHashAddrID: 0x06, // starts with p2
+	WitnessScriptHashAddrID: 0x0A, // starts with 7Xh
 
 	// BIP32 hierarchical deterministic extended key magics
 	HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv
@@ -449,9 +453,11 @@ var TestNet3Params = Params{
 	Bech32HRPSegwit: "tb", // always tb for test net
 
 	// Address encoding magics
-	PubKeyHashAddrID: 0x6f, // starts with m or n
-	ScriptHashAddrID: 0xc4, // starts with 2
-	PrivateKeyID:     0xef, // starts with 9 (uncompressed) or c (compressed)
+	PubKeyHashAddrID:        0x6f, // starts with m or n
+	ScriptHashAddrID:        0xc4, // starts with 2
+	WitnessPubKeyHashAddrID: 0x03, // starts with QW
+	WitnessScriptHashAddrID: 0x28, // starts with T7n
+	PrivateKeyID:            0xef, // starts with 9 (uncompressed) or c (compressed)
 
 	// BIP32 hierarchical deterministic extended key magics
 	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with tprv
@@ -522,9 +528,11 @@ var SimNetParams = Params{
 	Bech32HRPSegwit: "sb", // always sb for sim net
 
 	// Address encoding magics
-	PubKeyHashAddrID: 0x3f, // starts with S
-	ScriptHashAddrID: 0x7b, // starts with s
-	PrivateKeyID:     0x64, // starts with 4 (uncompressed) or F (compressed)
+	PubKeyHashAddrID:        0x3f, // starts with S
+	ScriptHashAddrID:        0x7b, // starts with s
+	PrivateKeyID:            0x64, // starts with 4 (uncompressed) or F (compressed)
+	WitnessPubKeyHashAddrID: 0x19, // starts with Gg
+	WitnessScriptHashAddrID: 0x28, // starts with ?
 
 	// BIP32 hierarchical deterministic extended key magics
 	HDPrivateKeyID: [4]byte{0x04, 0x20, 0xb9, 0x00}, // starts with sprv