diff --git a/client/client.go b/client/client.go
index 80c409637..dd1baa851 100644
--- a/client/client.go
+++ b/client/client.go
@@ -604,7 +604,7 @@ func (c *Client) reservePorts() {
 func (c *Client) fingerprint() error {
 	whitelist := c.config.ReadStringListToMap("fingerprint.whitelist")
 	whitelistEnabled := len(whitelist) > 0
-	c.logger.Printf("[DEBUG] client: built-in fingerprints: %v", fingerprint.BuiltinFingerprints)
+	c.logger.Printf("[DEBUG] client: built-in fingerprints: %v", fingerprint.BuiltinFingerprints())
 
 	var applied []string
 	var skipped []string