diff --git a/gstreamer/src/tags.rs b/gstreamer/src/tags.rs
index 3a5844228..2e95edaa5 100644
--- a/gstreamer/src/tags.rs
+++ b/gstreamer/src/tags.rs
@@ -1014,7 +1014,7 @@ mod tests {
     fn test_custom_tags() {
         ::init().unwrap();
 
-        struct MyCustomTag;
+        enum MyCustomTag {};
 
         impl<'a> Tag<'a> for MyCustomTag {
             type TagType = &'a str;