diff --git a/src/org/redkale/convert/DeMember.java b/src/org/redkale/convert/DeMember.java
index 29e2e1b46..a12bc8f1d 100644
--- a/src/org/redkale/convert/DeMember.java
+++ b/src/org/redkale/convert/DeMember.java
@@ -88,6 +88,6 @@ public final class DeMember<R extends Reader, T, F> implements Comparable<DeMemb
 
     @Override
     public String toString() {
-        return "DeMember{" + "attribute=" + attribute.field() + ", decoder=" + decoder + '}';
+        return "DeMember{" + "attribute=" + attribute.field() + ", decoder=" + (decoder == null ? null : decoder.getClass().getName()) + '}';
     }
 }
diff --git a/src/org/redkale/convert/EnMember.java b/src/org/redkale/convert/EnMember.java
index 1f8042eef..883ff0bcc 100644
--- a/src/org/redkale/convert/EnMember.java
+++ b/src/org/redkale/convert/EnMember.java
@@ -81,6 +81,6 @@ public final class EnMember<W extends Writer, T, F> implements Comparable<EnMemb
 
     @Override
     public String toString() {
-        return "EnMember{" + "attribute=" + attribute.field() + ", encoder=" + encoder + '}';
+        return "EnMember{" + "attribute=" + attribute.field() + ", encoder=" + (encoder == null ? null : encoder.getClass().getName()) + '}';
     }
 }