diff --git a/ibm/service/power/data_source_ibm_pi_network_interface.go b/ibm/service/power/data_source_ibm_pi_network_interface.go
index dc168d7e4f..1bebe73f01 100644
--- a/ibm/service/power/data_source_ibm_pi_network_interface.go
+++ b/ibm/service/power/data_source_ibm_pi_network_interface.go
@@ -99,7 +99,7 @@ func DataSourceIBMPINetworkInterface() *schema.Resource {
 				Computed:    true,
 				Description: "List of network security groups that the network interface is a member of.",
 				Elem:        &schema.Schema{Type: schema.TypeString},
-				Type:        schema.TypeList,
+				Type:        schema.TypeSet,
 			},
 			Attr_Status: {
 				Computed:    true,
diff --git a/ibm/service/power/data_source_ibm_pi_network_interfaces.go b/ibm/service/power/data_source_ibm_pi_network_interfaces.go
index 291776b9ee..da7df5ab7f 100644
--- a/ibm/service/power/data_source_ibm_pi_network_interfaces.go
+++ b/ibm/service/power/data_source_ibm_pi_network_interfaces.go
@@ -97,7 +97,7 @@ func DataSourceIBMPINetworkInterfaces() *schema.Resource {
 							Computed:    true,
 							Description: "List of network security groups that the network interface is a member of.",
 							Elem:        &schema.Schema{Type: schema.TypeString},
-							Type:        schema.TypeList,
+							Type:        schema.TypeSet,
 						},
 						Attr_Status: {
 							Computed:    true,
diff --git a/ibm/service/power/resource_ibm_pi_network_interface.go b/ibm/service/power/resource_ibm_pi_network_interface.go
index ca338f7261..e1690e4825 100644
--- a/ibm/service/power/resource_ibm_pi_network_interface.go
+++ b/ibm/service/power/resource_ibm_pi_network_interface.go
@@ -138,7 +138,7 @@ func ResourceIBMPINetworkInterface() *schema.Resource {
 				Computed:    true,
 				Description: "List of network security groups that the network interface is a member of.",
 				Elem:        &schema.Schema{Type: schema.TypeString},
-				Type:        schema.TypeList,
+				Type:        schema.TypeSet,
 			},
 			Attr_Status: {
 				Computed:    true,