diff --git a/cmd/xgo/option.go b/cmd/xgo/option.go
index 3bb9e4c2..ea80da74 100644
--- a/cmd/xgo/option.go
+++ b/cmd/xgo/option.go
@@ -37,7 +37,9 @@ type options struct {
 	// --options-from-file file
 	optionsFromFile string
 
-	// rules from command line will take higher priorities
+	// --mock-rule: rules from command line
+	// amend the --options-from-file.
+	// it will take higher priority
 	mockRules []string
 
 	// dev only
diff --git a/cmd/xgo/rule.go b/cmd/xgo/rule.go
index 4f75093f..2d557b24 100644
--- a/cmd/xgo/rule.go
+++ b/cmd/xgo/rule.go
@@ -20,6 +20,7 @@ type Rule struct {
 	MainModule *bool   `json:"main_module"`
 	Generic    *bool   `json:"generic"`
 	Exported   *bool   `json:"exported"`
+	Closure    *bool   `json:"closure"`
 	Action     string  `json:"action"` // include,exclude or empty
 }
 
diff --git a/cmd/xgo/version.go b/cmd/xgo/version.go
index 7a837d1e..7c25dda8 100644
--- a/cmd/xgo/version.go
+++ b/cmd/xgo/version.go
@@ -4,8 +4,8 @@ import "fmt"
 
 // auto updated
 const VERSION = "1.0.45"
-const REVISION = "377e54a28f85da721ce413317ca99a91fc55626d+1"
-const NUMBER = 292
+const REVISION = "dda3d723508dbe0490317e7af9ffba15de82b778+1"
+const NUMBER = 293
 
 // manually updated
 const CORE_VERSION = "1.0.43"
diff --git a/patch/match/match.go b/patch/match/match.go
index 8cf3138e..d952826b 100644
--- a/patch/match/match.go
+++ b/patch/match/match.go
@@ -16,6 +16,7 @@ type Rule struct {
 	MainModule *bool   `json:"main_module"`
 	Generic    *bool   `json:"generic"`
 	Exported   *bool   `json:"exported"`
+	Closure    *bool   `json:"closure"`
 	Action     string  `json:"action"` // include,exclude or empty
 
 	kinds []string
@@ -106,6 +107,12 @@ func Match(rule *Rule, pkgPath string, isMainModule bool, funcDecl *info.DeclInf
 			return false
 		}
 	}
+	if rule.Closure != nil {
+		hasAnyCondition = true
+		if *rule.Closure != funcDecl.Closure {
+			return false
+		}
+	}
 	if hasAnyCondition {
 		return true
 	}
diff --git a/runtime/test/mock/rule/rule_test.go b/runtime/test/mock/rule/rule_test.go
new file mode 100644
index 00000000..9040efb4
--- /dev/null
+++ b/runtime/test/mock/rule/rule_test.go
@@ -0,0 +1,45 @@
+package rule
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/xhd2015/xgo/runtime/core"
+	"github.com/xhd2015/xgo/runtime/trap"
+)
+
+func getClosure() func() {
+	return func() {
+
+	}
+}
+func TestClosureDefaultMock(t *testing.T) {
+	testClosureDefaultMock(t, "call getClosure\ncall getClosure.func1\n")
+}
+
+// flags: --mock-rule '{"closure":true,"action":"exclude"}'
+func TestClosureWithMockRuleNoMock(t *testing.T) {
+	testClosureDefaultMock(t, "call getClosure\n")
+}
+
+func testClosureDefaultMock(t *testing.T, expect string) {
+	var buf strings.Builder
+	trap.AddInterceptor(&trap.Interceptor{
+		Pre: func(ctx context.Context, f *core.FuncInfo, args, result core.Object) (data interface{}, err error) {
+			if f.Stdlib {
+				return
+			}
+			buf.WriteString(fmt.Sprintf("call %s\n", f.IdentityName))
+			return
+		},
+	})
+	closure := getClosure()
+	closure()
+
+	got := buf.String()
+	if got != expect {
+		t.Fatalf("interceptor expect: %q, actual: %q", expect, got)
+	}
+}
diff --git a/script/run-test/main.go b/script/run-test/main.go
index 22c3d542..b8e4bac1 100644
--- a/script/run-test/main.go
+++ b/script/run-test/main.go
@@ -144,6 +144,16 @@ var extraSubTests = []*TestCase{
 		dir:   "runtime/test/recover_no_trap",
 		flags: []string{"--trap-stdlib"},
 	},
+	{
+		name:  "mock_rule_not_set",
+		dir:   "runtime/test/mock/rule",
+		flags: []string{"-run", "TestClosureDefaultMock"},
+	},
+	{
+		name:  "mock_rule_set",
+		dir:   "runtime/test/mock/rule",
+		flags: []string{"-run", "TestClosureWithMockRuleNoMock", "--mock-rule", `{"closure":true,"action":"exclude"}`},
+	},
 	{
 		name:       "xgo_integration",
 		usePlainGo: true,