diff --git a/README-CN.md b/README-CN.md
index 6b1f740..3307d96 100644
--- a/README-CN.md
+++ b/README-CN.md
@@ -229,7 +229,7 @@ func main(){
     SetType("ecs_ram_role").
     // `roleName` is optional. It will be retrieved automatically if not set. It is highly recommended to set it up to reduce requests
     SetRoleName("RoleName").
-    // `DisableIMDSv1` is optional and is recommended to be turned on. It can be replaced by setting environment variable: ALIBABA_CLOUD_IMDSV1_DISABLE
+    // `DisableIMDSv1` is optional and is recommended to be turned on. It can be replaced by setting environment variable: ALIBABA_CLOUD_IMDSV1_DISABLED
     SetDisableIMDSv1(true)
 
   provider, err := credentials.NewCredential(config)
diff --git a/README.md b/README.md
index d65f5c8..171b5a0 100644
--- a/README.md
+++ b/README.md
@@ -248,7 +248,7 @@ func main(){
     SetType("ecs_ram_role").
     // `roleName` is optional. It will be retrieved automatically if not set. It is highly recommended to set it up to reduce requests
     SetRoleName("RoleName").
-    // `DisableIMDSv1` is optional and is recommended to be turned on. It can be replaced by setting environment variable: ALIBABA_CLOUD_IMDSV1_DISABLE
+    // `DisableIMDSv1` is optional and is recommended to be turned on. It can be replaced by setting environment variable: ALIBABA_CLOUD_IMDSV1_DISABLED
     SetDisableIMDSv1(true)
 
   provider, err := credentials.NewCredential(config)
diff --git a/credentials/internal/providers/ecs_ram_role.go b/credentials/internal/providers/ecs_ram_role.go
index 466031d..223666a 100644
--- a/credentials/internal/providers/ecs_ram_role.go
+++ b/credentials/internal/providers/ecs_ram_role.go
@@ -49,7 +49,7 @@ func (builder *ECSRAMRoleCredentialsProviderBuilder) Build() (provider *ECSRAMRo
 	}
 
 	if !builder.provider.disableIMDSv1 {
-		builder.provider.disableIMDSv1 = os.Getenv("ALIBABA_CLOUD_IMDSV1_DISABLE") == "true"
+		builder.provider.disableIMDSv1 = os.Getenv("ALIBABA_CLOUD_IMDSV1_DISABLED") == "true"
 	}
 
 	provider = builder.provider
diff --git a/credentials/internal/providers/ecs_ram_role_test.go b/credentials/internal/providers/ecs_ram_role_test.go
index 7fc987c..fae800c 100644
--- a/credentials/internal/providers/ecs_ram_role_test.go
+++ b/credentials/internal/providers/ecs_ram_role_test.go
@@ -388,14 +388,14 @@ func TestECSRAMRoleCredentialsProvider_getMetadataToken(t *testing.T) {
 	_, err = p.getMetadataToken()
 	assert.Nil(t, err)
 
-	os.Setenv("ALIBABA_CLOUD_IMDSV1_DISABLE", "true")
+	os.Setenv("ALIBABA_CLOUD_IMDSV1_DISABLED", "true")
 	p, err = NewECSRAMRoleCredentialsProviderBuilder().Build()
 	assert.Nil(t, err)
 
 	_, err = p.getMetadataToken()
 	assert.NotNil(t, err)
 
-	os.Setenv("ALIBABA_CLOUD_IMDSV1_DISABLE", "")
+	os.Setenv("ALIBABA_CLOUD_IMDSV1_DISABLED", "")
 	p, err = NewECSRAMRoleCredentialsProviderBuilder().Build()
 	assert.Nil(t, err)