diff --git a/api/server/middleware/debug.go b/api/server/middleware/debug.go
index 8c8567669b..b931f1906b 100644
--- a/api/server/middleware/debug.go
+++ b/api/server/middleware/debug.go
@@ -64,7 +64,7 @@ func maskSecretKeys(inp interface{}) {
 	if form, ok := inp.(map[string]interface{}); ok {
 	loop0:
 		for k, v := range form {
-			for _, m := range []string{"password", "secret", "jointoken", "unlockkey"} {
+			for _, m := range []string{"password", "secret", "jointoken", "unlockkey", "signingcakey"} {
 				if strings.EqualFold(m, k) {
 					form[k] = "*****"
 					continue loop0