diff --git a/cmd/scw/testdata/test-all-usage-instance-security-group-list-usage.golden b/cmd/scw/testdata/test-all-usage-instance-security-group-list-usage.golden
index 3b099baab4..44e6c05e0f 100644
--- a/cmd/scw/testdata/test-all-usage-instance-security-group-list-usage.golden
+++ b/cmd/scw/testdata/test-all-usage-instance-security-group-list-usage.golden
@@ -13,6 +13,7 @@ ARGS:
   [name]              Name of the security group
   [project-id]        The security group project ID
   [tags.{index}]      List security groups with these exact tags (to filter with several tags, use commas to separate them)
+  [project-default]   Filter security groups with this value for project_default
   [organization-id]   The security group organization ID
   [zone=fr-par-1]     Zone to target. If none is passed will use default zone from the config (fr-par-1 | fr-par-2 | fr-par-3 | nl-ams-1 | nl-ams-2 | pl-waw-1)
 
diff --git a/docs/commands/instance.md b/docs/commands/instance.md
index ab4b1e321a..349a409918 100644
--- a/docs/commands/instance.md
+++ b/docs/commands/instance.md
@@ -1056,6 +1056,7 @@ scw instance security-group list [arg=value ...]
 | name |  | Name of the security group |
 | project-id |  | The security group project ID |
 | tags.{index} |  | List security groups with these exact tags (to filter with several tags, use commas to separate them) |
+| project-default |  | Filter security groups with this value for project_default |
 | organization-id |  | The security group organization ID |
 | zone | Default: `fr-par-1`<br />One of: `fr-par-1`, `fr-par-2`, `fr-par-3`, `nl-ams-1`, `nl-ams-2`, `pl-waw-1` | Zone to target. If none is passed will use default zone from the config |
 
diff --git a/internal/namespaces/instance/v1/instance_cli.go b/internal/namespaces/instance/v1/instance_cli.go
index 55937cdc3a..a76e019932 100644
--- a/internal/namespaces/instance/v1/instance_cli.go
+++ b/internal/namespaces/instance/v1/instance_cli.go
@@ -1782,6 +1782,13 @@ func instanceSecurityGroupList() *core.Command {
 				Deprecated: false,
 				Positional: false,
 			},
+			{
+				Name:       "project-default",
+				Short:      `Filter security groups with this value for project_default`,
+				Required:   false,
+				Deprecated: false,
+				Positional: false,
+			},
 			{
 				Name:       "organization",
 				Short:      `The security group organization ID`,