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--- a/src/rcvqueue.h
+++ b/src/rcvqueue.h
@@ -76,6 +76,9 @@
     void *(*worker)(void *);
 };
 
+extern void copyswap(unsigned char *dest, const unsigned char *src, 
+                     unsigned int bytes, unsigned int bits);
+
 extern AudioEater httpAudioEater;
 extern AudioEater alsaAudioEater;