diff --git a/msgpack_reader.go b/msgpack_reader.go
index a3afebe..fd83985 100644
--- a/msgpack_reader.go
+++ b/msgpack_reader.go
@@ -71,6 +71,7 @@ func (rd *msgpackReader) ReadInt8(v *int8, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -101,6 +102,7 @@ func (rd *msgpackReader) ReadInt16(v *int16, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -131,6 +133,7 @@ func (rd *msgpackReader) ReadInt32(v *int32, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -161,6 +164,7 @@ func (rd *msgpackReader) ReadInt64(v *int64, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -191,6 +195,7 @@ func (rd *msgpackReader) ReadUint8(v *uint8, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -221,6 +226,7 @@ func (rd *msgpackReader) ReadUint16(v *uint16, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -251,6 +257,7 @@ func (rd *msgpackReader) ReadUint32(v *uint32, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -281,6 +288,7 @@ func (rd *msgpackReader) ReadUint64(v *uint64, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -311,6 +319,7 @@ func (rd *msgpackReader) ReadBool(v *bool, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -341,6 +350,7 @@ func (rd *msgpackReader) ReadFloat32(v *float32, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -371,6 +381,7 @@ func (rd *msgpackReader) ReadFloat64(v *float64, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -401,6 +412,7 @@ func (rd *msgpackReader) ReadString(v *string, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound
@@ -431,6 +443,7 @@ func (rd *msgpackReader) ReadBytes(v *[]byte, targetField string) error {
 			return errors.WithStack(err)
 		}
 		rd.curr.values[field] = raw
+		rd.curr.readCnt = i + 1
 	}
 
 	return FieldNotFound