--- asterisk-1.8.0/channels/chan_oss.c	2010-11-19 20:44:52.922559641 +0100
+++ asterisk-1.8.0-patch/channels/chan_oss.c	2010-11-19 20:45:08.770364280 +0100
@@ -47,7 +47,7 @@
 
 #ifdef __linux
 #include <linux/soundcard.h>
-#elif defined(__FreeBSD__) || defined(__CYGWIN__)
+#elif defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun)
 #include <sys/soundcard.h>
 #else
 #include <soundcard.h>
@@ -248,7 +248,7 @@
 	char *name;
 	int total_blocks;			/*!< total blocks in the output device */
 	int sounddev;
-	enum { M_UNSET, M_FULL, M_READ, M_WRITE } duplex;
+	enum { M_UNSET, M_FULL, M_READX, M_WRITE } duplex;
 	int autoanswer;             /*!< Boolean: whether to answer the immediately upon calling */
 	int autohangup;             /*!< Boolean: whether to hangup the call when the remote end hangs up */
 	int hookstate;              /*!< Boolean: 1 if offhook; 0 if onhook */
@@ -516,7 +516,7 @@
 		break;
 
 	case O_RDONLY:
-		o->duplex = M_READ;
+		o->duplex = M_READX;
 		break;
 	}