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-rw-r--r--audio/audiostream.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/audio/audiostream.h b/audio/audiostream.h
index 347a37b9dc..840a25abda 100644
--- a/audio/audiostream.h
+++ b/audio/audiostream.h
@@ -86,7 +86,7 @@ public:
* to its initial state. Note that rewinding itself is not required to
* be working when the stream is being played by Mixer!
*/
-class RewindableAudioStream : public AudioStream {
+class RewindableAudioStream : public virtual AudioStream {
public:
/**
* Rewinds the stream to its start.
@@ -153,7 +153,7 @@ AudioStream *makeLoopingAudioStream(RewindableAudioStream *stream, uint loops);
* interface for seeking. The seeking itself is not required to be
* working while the stream is being played by Mixer!
*/
-class SeekableAudioStream : public RewindableAudioStream {
+class SeekableAudioStream : public virtual RewindableAudioStream {
public:
/**
* Tries to load a file by trying all available formats.