diff --git a/vim25/types/fault.go b/vim25/types/fault.go
index c2503fa5c..813ea9ec6 100644
--- a/vim25/types/fault.go
+++ b/vim25/types/fault.go
@@ -30,3 +30,14 @@ func IsFileNotFound(err error) bool {
 
 	return false
 }
+
+func IsAlreadyExists(err error) bool {
+	if f, ok := err.(HasFault); ok {
+		switch f.Fault().(type) {
+		case *AlreadyExists:
+			return true
+		}
+	}
+
+	return false
+}