diff --git a/src/primitives/block.h b/src/primitives/block.h
--- a/src/primitives/block.h
+++ b/src/primitives/block.h
@@ -111,7 +111,7 @@
 
     CBlockLocator() {}
 
-    CBlockLocator(const std::vector<uint256> &vHaveIn) { vHave = vHaveIn; }
+    CBlockLocator(const std::vector<uint256> &vHaveIn) : vHave(vHaveIn) {}
 
     ADD_SERIALIZE_METHODS;
 
diff --git a/src/rpc/jsonrpcrequest.h b/src/rpc/jsonrpcrequest.h
--- a/src/rpc/jsonrpcrequest.h
+++ b/src/rpc/jsonrpcrequest.h
@@ -18,11 +18,7 @@
     std::string URI;
     std::string authUser;
 
-    JSONRPCRequest() {
-        id = NullUniValue;
-        params = NullUniValue;
-        fHelp = false;
-    }
+    JSONRPCRequest() : id(NullUniValue), params(NullUniValue), fHelp(false) {}
 
     void parse(const UniValue &valRequest);
 };
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -145,7 +145,7 @@
     std::string name;
     std::string purpose;
 
-    CAddressBookData() { purpose = "unknown"; }
+    CAddressBookData() : purpose("unknown") {}
 
     typedef std::map<std::string, std::string> StringMap;
     StringMap destdata;