diff --git a/pkg/util/validation/validation.go b/pkg/util/validation/validation.go
index aaf63190887..c2658312449 100644
--- a/pkg/util/validation/validation.go
+++ b/pkg/util/validation/validation.go
@@ -283,8 +283,7 @@ func IsConfigMapKey(value string) []string {
 	}
 	if value == "." {
 		errs = append(errs, `must not be '.'`)
-	}
-	if value == ".." {
+	} else if value == ".." {
 		errs = append(errs, `must not be '..'`)
 	} else if strings.HasPrefix(value, "..") {
 		errs = append(errs, `must not start with '..'`)