--- res_musiconhold.c.orig	2006-06-03 10:02:49.000000000 -0700
+++ res_musiconhold.c	2006-08-06 15:22:01.332444000 -0700
@@ -45,7 +45,9 @@
 #endif
 #include <unistd.h>
 #include <sys/ioctl.h>
-
+#ifdef SOLARIS
+#include <thread.h>
+#endif
 #include "asterisk.h"
 
 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 31775 $")
@@ -493,6 +495,9 @@
 			}
 		}
 		if (class->pseudofd > -1) {
+#ifdef SOLARIS
+			thr_yield();
+#endif
 			/* Pause some amount of time */
 			res = read(class->pseudofd, buf, sizeof(buf));
 			pthread_testcancel();