diff --git a/protocol/src/main/java/com/zfoo/protocol/serializer/php/CodeGeneratePhp.java b/protocol/src/main/java/com/zfoo/protocol/serializer/php/CodeGeneratePhp.java
index abfd4ef4..cb897a49 100644
--- a/protocol/src/main/java/com/zfoo/protocol/serializer/php/CodeGeneratePhp.java
+++ b/protocol/src/main/java/com/zfoo/protocol/serializer/php/CodeGeneratePhp.java
@@ -243,8 +243,10 @@ public class CodeGeneratePhp implements ICodeGenerate {
             for (var fieldNote : fieldNotes) {
                 phpBuilder.append(fieldNote).append(LS);
             }
-            var pair = phpSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
-            phpBuilder.append(StringUtils.format("var {} ${} = {};", pair.getKey(), fieldName, pair.getValue())).append(LS);
+            var fieldTypeDefaultValue = phpSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
+            var fieldType = fieldTypeDefaultValue.getKey();
+            var fieldDefaultValue = fieldTypeDefaultValue.getValue();
+            phpBuilder.append(StringUtils.format("var {} ${} = {};", fieldType, fieldName, fieldDefaultValue)).append(LS);
         }
         return phpBuilder.toString();
     }
diff --git a/protocol/src/main/java/com/zfoo/protocol/serializer/scala/CodeGenerateScala.java b/protocol/src/main/java/com/zfoo/protocol/serializer/scala/CodeGenerateScala.java
index 73d82c1d..e65b913c 100644
--- a/protocol/src/main/java/com/zfoo/protocol/serializer/scala/CodeGenerateScala.java
+++ b/protocol/src/main/java/com/zfoo/protocol/serializer/scala/CodeGenerateScala.java
@@ -279,8 +279,10 @@ public class CodeGenerateScala implements ICodeGenerate {
             for (var fieldNote : fieldNotes) {
                 scalaBuilder.append(fieldNote).append(LS);
             }
-            var pair = scalaSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
-            scalaBuilder.append(StringUtils.format("var {}: {} = {}", fieldName, pair.getKey(), pair.getValue())).append(LS);
+            var fieldTypeDefaultValue = scalaSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
+            var fieldType = fieldTypeDefaultValue.getKey();
+            var fieldDefaultValue = fieldTypeDefaultValue.getValue();
+            scalaBuilder.append(StringUtils.format("var {}: {} = {}", fieldName, fieldType, fieldDefaultValue)).append(LS);
         }
         return scalaBuilder.toString();
     }
diff --git a/protocol/src/main/java/com/zfoo/protocol/serializer/typescript/CodeGenerateTypeScript.java b/protocol/src/main/java/com/zfoo/protocol/serializer/typescript/CodeGenerateTypeScript.java
index 3e4e7077..415b830b 100644
--- a/protocol/src/main/java/com/zfoo/protocol/serializer/typescript/CodeGenerateTypeScript.java
+++ b/protocol/src/main/java/com/zfoo/protocol/serializer/typescript/CodeGenerateTypeScript.java
@@ -293,8 +293,10 @@ public class CodeGenerateTypeScript implements ICodeGenerate {
             for (var fieldNote : fieldNotes) {
                 tsBuilder.append(fieldNote).append(LS);
             }
-            var pair = tsSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
-            tsBuilder.append(StringUtils.format("{}: {} = {};", fieldName, pair.getKey(), pair.getValue())).append(LS);
+            var fieldTypeDefaultValue = tsSerializer(fieldRegistration.serializer()).fieldTypeDefaultValue(field, fieldRegistration);
+            var fieldType = fieldTypeDefaultValue.getKey();
+            var fieldDefaultValue = fieldTypeDefaultValue.getValue();
+            tsBuilder.append(StringUtils.format("{}: {} = {};", fieldName, fieldType, fieldDefaultValue)).append(LS);
         }
         return tsBuilder.toString();
     }