diff --git a/builtin/providers/openstack/resource_openstack_compute_secgroup_v2.go b/builtin/providers/openstack/resource_openstack_compute_secgroup_v2.go
index 4e91c78a82..e3d281b2e1 100644
--- a/builtin/providers/openstack/resource_openstack_compute_secgroup_v2.go
+++ b/builtin/providers/openstack/resource_openstack_compute_secgroup_v2.go
@@ -314,7 +314,7 @@ func secgroupRuleV2Hash(v interface{}) int {
 	buf.WriteString(fmt.Sprintf("%s-", m["ip_protocol"].(string)))
 	buf.WriteString(fmt.Sprintf("%s-", m["cidr"].(string)))
 	buf.WriteString(fmt.Sprintf("%s-", m["from_group_id"].(string)))
-	buf.WriteString(fmt.Sprintf("%s-", m["self"].(bool)))
+	buf.WriteString(fmt.Sprintf("%t-", m["self"].(bool)))
 
 	return hashcode.String(buf.String())
 }