diff --git a/enforcer.go b/enforcer.go
index fd3f43a8d..eaa93f3c1 100644
--- a/enforcer.go
+++ b/enforcer.go
@@ -218,6 +218,11 @@ func (e *Enforcer) initialize() {
 	e.autoBuildRoleLinks = true
 	e.autoNotifyWatcher = true
 	e.autoNotifyDispatcher = true
+
+	if e.model["g"] != nil && len(e.model["g"]) > 1 {
+		e.model.AddDef("g", "*", "_, _")
+	}
+
 	e.initRmMap()
 }
 
@@ -477,6 +482,11 @@ func (e *Enforcer) SavePolicy() error {
 	if e.IsFiltered() {
 		return errors.New("cannot save a filtered policy")
 	}
+
+	if e.model["g"] != nil && e.model["g"]["*"] != nil {
+		delete(e.model["g"], "*")
+	}
+
 	if err := e.adapter.SavePolicy(e.model); err != nil {
 		return err
 	}
diff --git a/model/model.go b/model/model.go
index bffb9deeb..d51021ac3 100644
--- a/model/model.go
+++ b/model/model.go
@@ -195,6 +195,7 @@ func (model Model) loadModelFromConfig(cfg config.ConfigInterface) error {
 	for s := range sectionNameMap {
 		loadSection(model, cfg, s)
 	}
+
 	ms := make([]string, 0)
 	for _, rs := range requiredSections {
 		if !model.hasSection(rs) {
@@ -392,6 +393,9 @@ func (model Model) ToText() string {
 	if _, ok := model["g"]; ok {
 		s.WriteString("[role_definition]\n")
 		for ptype := range model["g"] {
+			if ptype == "*" {
+				continue
+			}
 			s.WriteString(fmt.Sprintf("%s = %s\n", ptype, model["g"][ptype].Value))
 		}
 	}
diff --git a/model/policy.go b/model/policy.go
index 875da0901..4915d41be 100644
--- a/model/policy.go
+++ b/model/policy.go
@@ -228,6 +228,16 @@ func (model Model) AddPolicy(sec string, ptype string, rule []string) error {
 	assertion.Policy = append(assertion.Policy, rule)
 	assertion.PolicyMap[strings.Join(rule, DefaultSep)] = len(model[sec][ptype].Policy) - 1
 
+	if sec == "g" && len(model["g"]) > 1 {
+		assert, err := model.GetAssertion(sec, "*")
+		if err != nil {
+			return err
+		} else {
+			assert.Policy = append(assert.Policy, rule)
+			assert.PolicyMap[strings.Join(rule, DefaultSep)] = len(model[sec]["*"].Policy) - 1
+		}
+	}
+
 	hasPriority := false
 	if _, ok := assertion.FieldIndexMap[constant.PriorityIndex]; ok {
 		hasPriority = true
diff --git a/rbac_api.go b/rbac_api.go
index fe2a6e7a0..8fa59d5ec 100644
--- a/rbac_api.go
+++ b/rbac_api.go
@@ -239,6 +239,7 @@ func (e *Enforcer) GetImplicitRolesForUser(name string, domain ...string) ([]str
 		res = append(res, roles...)
 	}
 
+	util.ArrayRemoveDuplicates(&res)
 	return res, nil
 }
 
@@ -311,6 +312,7 @@ func (e *Enforcer) GetImplicitUsersForRole(name string, domain ...string) ([]str
 		}
 	}
 
+	util.ArrayRemoveDuplicates(&res)
 	return res, nil
 }
 
@@ -327,6 +329,10 @@ func (e *Enforcer) GetImplicitPermissionsForUser(user string, domain ...string)
 	return e.GetNamedImplicitPermissionsForUser("p", "g", user, domain...)
 }
 
+func (e *Enforcer) GetImplicitPermissionsForUserFromAllRoles(user string, domain ...string) ([][]string, error) {
+	return e.GetNamedImplicitPermissionsForUser("p", "*", user, domain...)
+}
+
 // GetNamedImplicitPermissionsForUser gets implicit permissions for a user or role by named policy.
 // Compared to GetNamedPermissionsForUser(), this function retrieves permissions for inherited roles.
 // For example:
diff --git a/rbac_api_test.go b/rbac_api_test.go
index ccf69490f..f840c343a 100644
--- a/rbac_api_test.go
+++ b/rbac_api_test.go
@@ -15,6 +15,7 @@
 package casbin
 
 import (
+	"fmt"
 	"log"
 	"sort"
 	"testing"
@@ -283,6 +284,7 @@ func TestPermissionAPI(t *testing.T) {
 	e, _ = NewEnforcer("examples/rbac_with_multiple_policy_model.conf", "examples/rbac_with_multiple_policy_policy.csv")
 	testGetNamedPermissionsForUser(t, e, "p", "user", [][]string{{"user", "/data", "GET"}})
 	testGetNamedPermissionsForUser(t, e, "p2", "user", [][]string{{"user", "view"}})
+	testGetImplicitPermissionsForUserFromAllRoles(t, e, "alice", [][]string{{"user", "/data", "GET"}, {"admin", "/data", "POST"}})
 }
 
 func testGetImplicitRoles(t *testing.T, e *Enforcer, name string, res []string) {
@@ -334,6 +336,17 @@ func testGetImplicitPermissions(t *testing.T, e *Enforcer, name string, res [][]
 	}
 }
 
+func testGetImplicitPermissionsForUserFromAllRoles(t *testing.T, e *Enforcer, name string, res [][]string, domain ...string) {
+	t.Helper()
+	myRes, _ := e.GetImplicitPermissionsForUserFromAllRoles(name, domain...)
+	fmt.Println(e.GetNamedImplicitRolesForUser("*", name))
+	t.Log("Implicit permissions for ", name, "from all roles", ": ", myRes)
+
+	if !util.Set2DEquals(res, myRes) {
+		t.Error("Implicit permissions for ", name, ": ", myRes, ", supposed to be ", res)
+	}
+}
+
 func testGetImplicitPermissionsWithDomain(t *testing.T, e *Enforcer, name string, domain string, res [][]string) {
 	t.Helper()
 	myRes, _ := e.GetImplicitPermissionsForUser(name, domain)