diff --git a/doc/release-notes.md b/doc/release-notes.md
index f2d8ca3a151..58994a68394 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -63,6 +63,8 @@ UTXO set query (`GET /rest/getutxos/<checkmempool>/<txid>-<n>/<txid>-<n>/.../<tx
 were changed to return status code HTTP_BAD_REQUEST (400) instead of HTTP_INTERNAL_SERVER_ERROR (500) when requests
 contain invalid parameters.
 
+The first boolean argument to `getaddednodeinfo` has been removed. This is an incompatible change.
+
 ### Configuration and command-line options
 
 ### Block and transaction handling
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index d0675fdb495..3003ea34528 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -26,7 +26,6 @@ static const CRPCConvertParam vRPCConvertParams[] =
 {
     { "stop", 0 },
     { "setmocktime", 0 },
-    { "getaddednodeinfo", 0 },
     { "generate", 0 },
     { "generate", 1 },
     { "generatetoaddress", 0 },
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index 88da77cb42c..840bfd5a242 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -269,14 +269,13 @@ UniValue disconnectnode(const UniValue& params, bool fHelp)
 
 UniValue getaddednodeinfo(const UniValue& params, bool fHelp)
 {
-    if (fHelp || params.size() < 1 || params.size() > 2)
+    if (fHelp || params.size() > 1)
         throw runtime_error(
-            "getaddednodeinfo dummy ( \"node\" )\n"
+            "getaddednodeinfo ( \"node\" )\n"
             "\nReturns information about the given added node, or all added nodes\n"
             "(note that onetry addnodes are not listed here)\n"
             "\nArguments:\n"
-            "1. dummy      (boolean, required) Kept for historical purposes but ignored\n"
-            "2. \"node\"   (string, optional) If provided, return information about this specific node, otherwise all nodes are returned.\n"
+            "1. \"node\"   (string, optional) If provided, return information about this specific node, otherwise all nodes are returned.\n"
             "\nResult:\n"
             "[\n"
             "  {\n"
@@ -299,10 +298,10 @@ UniValue getaddednodeinfo(const UniValue& params, bool fHelp)
 
     std::vector<AddedNodeInfo> vInfo = GetAddedNodeInfo();
 
-    if (params.size() == 2) {
+    if (params.size() == 1) {
         bool found = false;
         for (const AddedNodeInfo& info : vInfo) {
-            if (info.strAddedNode == params[1].get_str()) {
+            if (info.strAddedNode == params[0].get_str()) {
                 vInfo.assign(1, info);
                 found = true;
                 break;