diff --git a/signer/core/apitypes/types.go b/signer/core/apitypes/types.go
index 9113c091c5..73243b16a1 100644
--- a/signer/core/apitypes/types.go
+++ b/signer/core/apitypes/types.go
@@ -67,9 +67,9 @@ func (vs *ValidationMessages) Info(msg string) {
 }
 
 // GetWarnings returns an error with all messages of type WARN of above, or nil if no warnings were present
-func (v *ValidationMessages) GetWarnings() error {
+func (vs *ValidationMessages) GetWarnings() error {
 	var messages []string
-	for _, msg := range v.Messages {
+	for _, msg := range vs.Messages {
 		if msg.Typ == WARN || msg.Typ == CRIT {
 			messages = append(messages, msg.Message)
 		}