diff --git a/internal/encoder/vm_debug/vm.go b/internal/encoder/vm_debug/vm.go
index 585699b..b78d813 100644
--- a/internal/encoder/vm_debug/vm.go
+++ b/internal/encoder/vm_debug/vm.go
@@ -3659,8 +3659,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet, opt
 				code = code.NextField
 				break
 			}
+			iface := ptrToInterface(code, p)
+			if code.Nilcheck && encoder.IsNilForMarshaler(iface) {
+				code = code.NextField
+				break
+			}
 			b = append(b, code.Key...)
-			bb, err := appendMarshalJSON(code, b, ptrToInterface(code, p), false)
+			bb, err := appendMarshalJSON(code, b, iface, false)
 			if err != nil {
 				return nil, err
 			}