diff --git a/internal/encoder/compiler.go b/internal/encoder/compiler.go
index 3ae39ba..e234350 100644
--- a/internal/encoder/compiler.go
+++ b/internal/encoder/compiler.go
@@ -668,7 +668,7 @@ func (c *Compiler) structFieldCode(structCode *StructCode, tag *runtime.StructTa
 		}
 		fieldCode.value = code
 		fieldCode.isAddrForMarshaler = true
-		fieldCode.isNilCheck = false
+		fieldCode.isNilCheck = true
 	case isPtr && c.isPtrMarshalTextType(fieldType):
 		// *struct{ field T }
 		// func (*T) MarshalText() ([]byte, error)