diff --git a/routing/blindedpath/blinded_path.go b/routing/blindedpath/blinded_path.go
index 19a6edcaa..c03ae833c 100644
--- a/routing/blindedpath/blinded_path.go
+++ b/routing/blindedpath/blinded_path.go
@@ -82,7 +82,16 @@ type BuildBlindedPathCfg struct {
 	MinFinalCLTVExpiryDelta uint32
 
 	// BlocksUntilExpiry is the number of blocks that this blinded path
-	// should remain valid for.
+	// should remain valid for. This is a relative number of blocks. This
+	// number in addition with a potential minimum cltv delta for the last
+	// hop and some block padding will be the payment constraint which is
+	// part of the blinded hop info. Every htlc using the provided blinded
+	// hops cannot have a higher cltv delta otherwise it will get rejected
+	// by the forwarding nodes or the final node.
+	//
+	// This number should at least be greater than the invoice expiry time
+	// so that the blinded route is always valid as long as the invoice is
+	// valid.
 	BlocksUntilExpiry uint32
 
 	// MinNumHops is the minimum number of hops that each blinded path
@@ -105,13 +114,6 @@ type BuildBlindedPathCfg struct {
 func BuildBlindedPaymentPaths(cfg *BuildBlindedPathCfg) (
 	[]*zpay32.BlindedPaymentPath, error) {
 
-	if cfg.MinFinalCLTVExpiryDelta >= cfg.BlocksUntilExpiry {
-		return nil, fmt.Errorf("blinded path CLTV expiry delta (%d) "+
-			"must be greater than the minimum final CLTV expiry "+
-			"delta (%d)", cfg.BlocksUntilExpiry,
-			cfg.MinFinalCLTVExpiryDelta)
-	}
-
 	// Find some appropriate routes for the value to be routed. This will
 	// return a set of routes made up of real nodes.
 	routes, err := cfg.FindRoutes(cfg.ValueMsat)