diff --git a/sqlite/auth.go b/sqlite/auth.go
index 999b034..240e789 100644
--- a/sqlite/auth.go
+++ b/sqlite/auth.go
@@ -292,9 +292,11 @@ func createAuth(ctx context.Context, tx *Tx, auth *wtf.Auth) error {
 	}
 
 	// Update caller object to set ID.
-	if auth.ID, err = lastInsertID(result); err != nil {
+	id, err := result.LastInsertId()
+	if err != nil {
 		return err
 	}
+	auth.ID = int(id)
 
 	return nil
 }
diff --git a/sqlite/dial.go b/sqlite/dial.go
index d79f7cf..30fb852 100644
--- a/sqlite/dial.go
+++ b/sqlite/dial.go
@@ -397,9 +397,11 @@ func createDial(ctx context.Context, tx *Tx, dial *wtf.Dial) error {
 	}
 
 	// Read back new dial ID into caller argument.
-	if dial.ID, err = lastInsertID(result); err != nil {
+	id, err := result.LastInsertId()
+	if err != nil {
 		return err
 	}
+	dial.ID = int(id)
 
 	// Record initial value to history table.
 	if err := insertDialValue(ctx, tx, dial.ID, dial.Value, dial.CreatedAt); err != nil {
diff --git a/sqlite/dial_membership.go b/sqlite/dial_membership.go
index 2f21cc4..c49d7a0 100644
--- a/sqlite/dial_membership.go
+++ b/sqlite/dial_membership.go
@@ -268,9 +268,11 @@ func createDialMembership(ctx context.Context, tx *Tx, membership *wtf.DialMembe
 	}
 
 	// Assign new database ID to the caller's arg.
-	if membership.ID, err = lastInsertID(result); err != nil {
+	id, err := result.LastInsertId()
+	if err != nil {
 		return err
 	}
+	membership.ID = int(id)
 
 	// Ensure computed parent dial value is up to date.
 	if err := refreshDialValue(ctx, tx, membership.DialID); err != nil {
diff --git a/sqlite/sqlite.go b/sqlite/sqlite.go
index 9aea30e..54a8c6a 100644
--- a/sqlite/sqlite.go
+++ b/sqlite/sqlite.go
@@ -256,12 +256,6 @@ type Tx struct {
 	now time.Time
 }
 
-// lastInsertID is a helper function for reading the last inserted ID as an int.
-func lastInsertID(result sql.Result) (int, error) {
-	id, err := result.LastInsertId()
-	return int(id), err
-}
-
 // NullTime represents a helper wrapper for time.Time. It automatically converts
 // time fields to/from RFC 3339 format. Also supports NULL for zero time.
 type NullTime time.Time
diff --git a/sqlite/user.go b/sqlite/user.go
index 58f6529..ce5911c 100644
--- a/sqlite/user.go
+++ b/sqlite/user.go
@@ -247,9 +247,11 @@ func createUser(ctx context.Context, tx *Tx, user *wtf.User) error {
 		return FormatError(err)
 	}
 
-	if user.ID, err = lastInsertID(result); err != nil {
+	id, err := result.LastInsertId()
+	if err != nil {
 		return err
 	}
+	user.ID = int(id)
 
 	return nil
 }