diff --git a/ovh/resource_iploadbalancing_http_frontend.go b/ovh/resource_iploadbalancing_http_frontend.go
index f6a05649e..b836d351c 100644
--- a/ovh/resource_iploadbalancing_http_frontend.go
+++ b/ovh/resource_iploadbalancing_http_frontend.go
@@ -35,7 +35,7 @@ func resourceIpLoadbalancingHttpFrontend() *schema.Resource {
 				ForceNew: false,
 			},
 			"allowed_source": {
-				Type:     schema.TypeList,
+				Type:     schema.TypeSet,
 				Optional: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 			},
diff --git a/ovh/resource_iploadbalancing_tcp_frontend.go b/ovh/resource_iploadbalancing_tcp_frontend.go
index d3182296c..7c72819cd 100644
--- a/ovh/resource_iploadbalancing_tcp_frontend.go
+++ b/ovh/resource_iploadbalancing_tcp_frontend.go
@@ -35,12 +35,12 @@ func resourceIpLoadbalancingTcpFrontend() *schema.Resource {
 				ForceNew: false,
 			},
 			"allowed_source": {
-				Type:     schema.TypeList,
+				Type:     schema.TypeSet,
 				Optional: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 			},
 			"dedicated_ipfo": {
-				Type:     schema.TypeList,
+				Type:     schema.TypeSet,
 				Optional: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 			},