diff --git a/vm/compiler/bridge/bridge.go b/vm/compiler/bridge/bridge.go
index fb77d5e..6f28f0e 100644
--- a/vm/compiler/bridge/bridge.go
+++ b/vm/compiler/bridge/bridge.go
@@ -23,6 +23,9 @@ func (s BridgeService) Compile(patch sointu.Patch) (sointu.Synth, error) {
 
 func Synth(patch sointu.Patch) (*C.Synth, error) {
 	s := new(C.Synth)
+	if n := patch.NumDelayLines(); n > 64 {
+		return nil, fmt.Errorf("native bridge has currently a hard limit of 64 delaylines; patch uses %v", n)
+	}
 	comPatch, err := vm.Encode(patch, vm.AllFeatures{})
 	if err != nil {
 		return nil, fmt.Errorf("error compiling patch: %v", err)
@@ -103,6 +106,9 @@ func (s *C.Synth) Release(voice int) {
 
 // Update
 func (s *C.Synth) Update(patch sointu.Patch) error {
+	if n := patch.NumDelayLines(); n > 64 {
+		return fmt.Errorf("native bridge has currently a hard limit of 64 delaylines; patch uses %v", n)
+	}
 	comPatch, err := vm.Encode(patch, vm.AllFeatures{})
 	if err != nil {
 		return fmt.Errorf("error compiling patch: %v", err)