diff --git a/p2p/host/resource-manager/limit_config.go b/p2p/host/resource-manager/limit_config.go
index 532f5a4d71..e02d9aae58 100644
--- a/p2p/host/resource-manager/limit_config.go
+++ b/p2p/host/resource-manager/limit_config.go
@@ -280,7 +280,7 @@ func NewLimiterFromJSON(in io.Reader, defaults DefaultLimitConfig) (*BasicLimite
 	if len(cfg.Peer) > 0 {
 		limiter.PeerLimits = make(map[peer.ID]Limit, len(cfg.Peer))
 		for p, cfgLimit := range cfg.Peer {
-			pid, err := peer.IDFromString(p)
+			pid, err := peer.Decode(p)
 			if err != nil {
 				return nil, fmt.Errorf("invalid peer ID %s: %w", p, err)
 			}
diff --git a/p2p/host/resource-manager/limit_config_test.json b/p2p/host/resource-manager/limit_config_test.json
index b0571d86c1..a766a7f11a 100644
--- a/p2p/host/resource-manager/limit_config_test.json
+++ b/p2p/host/resource-manager/limit_config_test.json
@@ -51,5 +51,10 @@
     },
     "PeerDefault": {
         "Memory": 4096
+    },
+    "Peer": {
+	"12D3KooWPFH2Bx2tPfw6RLxN8k2wh47GRXgkt9yrAHU37zFwHWzS": {
+	    "Memory": 4096
+	}
     }
 }