diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index fc1d8367ea..59a73c7dd3 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -790,6 +790,11 @@ static RPCHelpMan getblockfrompeer()
         },
         [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
 {
+    RPCTypeCheck(request.params, {
+        UniValue::VSTR, // blockhash
+        UniValue::VNUM, // peer_id
+    });
+
     const NodeContext& node = EnsureAnyNodeContext(request.context);
     ChainstateManager& chainman = EnsureChainman(node);
     PeerManager& peerman = EnsurePeerman(node);
diff --git a/test/functional/rpc_getblockfrompeer.py b/test/functional/rpc_getblockfrompeer.py
index 71ed87293e..2988e0d967 100755
--- a/test/functional/rpc_getblockfrompeer.py
+++ b/test/functional/rpc_getblockfrompeer.py
@@ -49,14 +49,17 @@ class GetBlockFromPeerTest(BitcoinTestFramework):
         assert_equal(len(peers), 1)
         peer_0_peer_1_id = peers[0]["id"]
 
-        self.log.info("Arguments must be sensible")
-        assert_raises_rpc_error(-8, "hash must be of length 64 (not 4, for '1234')", self.nodes[0].getblockfrompeer, "1234", 0)
+        self.log.info("Arguments must be valid")
+        assert_raises_rpc_error(-8, "hash must be of length 64 (not 4, for '1234')", self.nodes[0].getblockfrompeer, "1234", peer_0_peer_1_id)
+        assert_raises_rpc_error(-3, "Expected type string, got number", self.nodes[0].getblockfrompeer, 1234, peer_0_peer_1_id)
+        assert_raises_rpc_error(-3, "Expected type number, got string", self.nodes[0].getblockfrompeer, short_tip, "0")
 
         self.log.info("We must already have the header")
         assert_raises_rpc_error(-1, "Block header missing", self.nodes[0].getblockfrompeer, "00" * 32, 0)
 
         self.log.info("Non-existent peer generates error")
-        assert_raises_rpc_error(-1, "Peer does not exist", self.nodes[0].getblockfrompeer, short_tip, peer_0_peer_1_id + 1)
+        for peer_id in [-1, peer_0_peer_1_id + 1]:
+            assert_raises_rpc_error(-1, "Peer does not exist", self.nodes[0].getblockfrompeer, short_tip, peer_id)
 
         self.log.info("Successful fetch")
         result = self.nodes[0].getblockfrompeer(short_tip, peer_0_peer_1_id)