diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 0fcf4c888..e3a811037 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -176,6 +176,8 @@ public:
         base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x88)(0xAD)(0xE4).convert_to_container<std::vector<unsigned char> >();
         // guarantees the first two characters, when base58 encoded, are "zc"
         base58Prefixes[ZCPAYMENT_ADDRRESS] = {22,154};
+        // guarantees the first 4 characters, when base58 encoded, are "ZiVK"
+        base58Prefixes[ZCVIEWING_KEY]      = {0xA8,0xAB,0xD3};
         // guarantees the first two characters, when base58 encoded, are "SK"
         base58Prefixes[ZCSPENDING_KEY] = {171,54};
 
@@ -499,6 +501,8 @@ public:
         base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
         base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();
         base58Prefixes[ZCPAYMENT_ADDRRESS] = {20,81};
+        // guarantees the first 4 characters, when base58 encoded, are "ZiVt"
+        base58Prefixes[ZCVIEWING_KEY]  = {0xA8,0xAC,0x0C};
         base58Prefixes[ZCSPENDING_KEY] = {177,235};
 
         vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));