diff --git a/guessit.go b/guessit.go
index fddfcba..62b34d0 100644
--- a/guessit.go
+++ b/guessit.go
@@ -122,6 +122,10 @@ func (g Guessit) Guessit(s string, options ...string) (out Match, err error) {
 		}
 	}
 
+	if _, ok := tmpmap["version"]; !ok {
+		tmpmap["version"] = -1
+	}
+
 	config := &mapstructure.DecoderConfig{
 		WeaklyTypedInput: true,
 		Result:           &out,