diff --git a/dlls/dmusic/collection.c b/dlls/dmusic/collection.c
index 1fddab5c5a3..13d5ce868d3 100644
--- a/dlls/dmusic/collection.c
+++ b/dlls/dmusic/collection.c
@@ -49,11 +49,6 @@ static inline IDirectMusicCollectionImpl *impl_from_IDirectMusicCollection(IDire
     return CONTAINING_RECORD(iface, IDirectMusicCollectionImpl, IDirectMusicCollection_iface);
 }
 
-static inline struct dmobject *impl_from_IDirectMusicObject(IDirectMusicObject *iface)
-{
-    return CONTAINING_RECORD(iface, struct dmobject, IDirectMusicObject_iface);
-}
-
 static inline IDirectMusicCollectionImpl *impl_from_IPersistStream(IPersistStream *iface)
 {
     return CONTAINING_RECORD(iface, IDirectMusicCollectionImpl, dmobj.IPersistStream_iface);