diff --git a/write.go b/write.go
index 3f5fb57..ecd6405 100644
--- a/write.go
+++ b/write.go
@@ -35,7 +35,7 @@ func (e *Encoder) encodeMap(val reflect.Value) error {
 	for _, k := range val.MapKeys() {
 		v := val.MapIndex(k)
 		if v.Kind() == reflect.Map {
-			return encodeMap(v)
+			return e.encodeMap(v)
 		}
 
 		if err := e.writeTuple(k.Interface(), v); err != nil {