diff --git a/qa/rpc-tests/wallet-hd.py b/qa/rpc-tests/wallet-hd.py
index f3ae69e10..c738ee220 100755
--- a/qa/rpc-tests/wallet-hd.py
+++ b/qa/rpc-tests/wallet-hd.py
@@ -47,10 +47,10 @@ class WalletHDTest(BitcoinTestFramework):
         self.nodes[0].generate(101)
         hd_add = None
         num_hd_adds = 300
-        for _ in range(num_hd_adds):
+        for i in range(num_hd_adds):
             hd_add = self.nodes[1].getnewaddress()
             hd_info = self.nodes[1].validateaddress(hd_add)
-            assert_equal(hd_info["hdkeypath"], "m/0'/0'/"+str(_+1)+"'")
+            assert_equal(hd_info["hdkeypath"], "m/0'/0'/"+str(i+1)+"'")
             assert_equal(hd_info["hdmasterkeyid"], masterkeyid)
             self.nodes[0].sendtoaddress(hd_add, 1)
             self.nodes[0].generate(1)
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index f4625743b..960d193e5 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2269,7 +2269,7 @@ UniValue getwalletinfo(const UniValue& params, bool fHelp)
             "  \"keypoolsize\": xxxx,        (numeric) how many new keys are pre-generated\n"
             "  \"unlocked_until\": ttt,      (numeric) the timestamp in seconds since epoch (midnight Jan 1 1970 GMT) that the wallet is unlocked for transfers, or 0 if the wallet is locked\n"
             "  \"paytxfee\": x.xxxx,         (numeric) the transaction fee configuration, set in " + CURRENCY_UNIT + "/kB\n"
-            "  \"masterkeyid\": \"<hash160>\", (string) the Hash160 of the hd master pubkey\n"
+            "  \"masterkeyid\": \"<hash160>\", (string) the Hash160 of the HD master pubkey\n"
             "}\n"
             "\nExamples:\n"
             + HelpExampleCli("getwalletinfo", "")
@@ -2291,7 +2291,7 @@ UniValue getwalletinfo(const UniValue& params, bool fHelp)
     obj.push_back(Pair("paytxfee",      ValueFromAmount(payTxFee.GetFeePerK())));
     CKeyID masterKeyID = pwalletMain->GetHDChain().masterKeyID;
     if (!masterKeyID.IsNull())
-         obj.push_back(Pair("masterkeyid",masterKeyID.GetHex()));
+         obj.push_back(Pair("masterkeyid", masterKeyID.GetHex()));
     return obj;
 }
 
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index d58cb7b0e..e9d669a7d 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -577,7 +577,7 @@ private:
 
     void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>);
 
-    /* the hd chain data model (external chain counters) */
+    /* the HD chain data model (external chain counters) */
     CHDChain hdChain;
 
 public:
@@ -896,10 +896,10 @@ public:
 
     bool BackupWallet(const std::string& strDest);
 
-    /* Set the hd chain model (chain child index counters) */
+    /* Set the HD chain model (chain child index counters) */
     bool SetHDChain(const CHDChain& chain, bool memonly);
 
-    /* Set the current hd master key (will reset the chain child index counters) */
+    /* Set the current HD master key (will reset the chain child index counters) */
     bool SetHDMasterKey(const CKey& key);
     const CHDChain& GetHDChain() { return hdChain; }
 };
diff --git a/src/wallet/walletdb.h b/src/wallet/walletdb.h
index 42179f228..5addd5c5c 100644
--- a/src/wallet/walletdb.h
+++ b/src/wallet/walletdb.h
@@ -41,7 +41,7 @@ enum DBErrors
     DB_NEED_REWRITE
 };
 
-/* simple hd chain data model */
+/* simple HD chain data model */
 class CHDChain
 {
 public:
@@ -79,7 +79,7 @@ public:
     int nVersion;
     int64_t nCreateTime; // 0 means unknown
     std::string hdKeypath; //optional HD/bip32 keypath
-    CKeyID hdMasterKeyID; //id of the hd masterkey used to derive this key
+    CKeyID hdMasterKeyID; //id of the HD masterkey used to derive this key
 
     CKeyMetadata()
     {