diff --git a/lnrpc/routerrpc/router_backend.go b/lnrpc/routerrpc/router_backend.go
index 1e2b5ccd..7fab7354 100644
--- a/lnrpc/routerrpc/router_backend.go
+++ b/lnrpc/routerrpc/router_backend.go
@@ -572,6 +572,14 @@ func (r *RouterBackend) extractIntentFromSendRequest(
 	}
 	payIntent.MaxParts = maxParts
 
+	// If this payment had a max shard amount specified, then we'll apply
+	// that now, which'll force us to always make payment splits smaller
+	// than this.
+	if rpcPayReq.MaxShardSizeMsat > 0 {
+		shardAmtMsat := lnwire.MilliSatoshi(rpcPayReq.MaxShardSizeMsat)
+		payIntent.MaxShardAmt = &shardAmtMsat
+	}
+
 	// Take fee limit from request.
 	payIntent.FeeLimit, err = lnrpc.UnmarshallAmt(
 		rpcPayReq.FeeLimitSat, rpcPayReq.FeeLimitMsat,
diff --git a/routing/router.go b/routing/router.go
index 4c1aa221..b308338a 100644
--- a/routing/router.go
+++ b/routing/router.go
@@ -1684,6 +1684,14 @@ type LightningPayment struct {
 	// MaxParts is the maximum number of partial payments that may be used
 	// to complete the full amount.
 	MaxParts uint32
+
+	// MaxShardAmt is the largest shard that we'll attempt to split using.
+	// If this field is set, and we need to split, rather than attempting
+	// half of the original payment amount, we'll use this value if half
+	// the payment amount is greater than it.
+	//
+	// NOTE: This field is _optional_.
+	MaxShardAmt *lnwire.MilliSatoshi
 }
 
 // SendPayment attempts to send a payment as described within the passed