diff --git a/types/ip.go b/types/ip.go
index 1ac8d27..448a6bb 100644
--- a/types/ip.go
+++ b/types/ip.go
@@ -58,7 +58,7 @@ func (i IP) Is6() bool {
 //
 // This function is needed so that a subnet can be inserted into
 // the database without much casting.
-func (s *Subnet) Value() (driver.Value, error) {
+func (s Subnet) Value() (driver.Value, error) {
 	return s.String(), nil
 }