diff --git a/src/libCom/osi/os/solaris/osdSock.h b/src/libCom/osi/os/solaris/osdSock.h
index 0330a974e..2b2c9ba3d 100644
--- a/src/libCom/osi/os/solaris/osdSock.h
+++ b/src/libCom/osi/os/solaris/osdSock.h
@@ -64,5 +64,9 @@ typedef int osiSockIoctl_t;
 #define SOCK_EMFILE EMFILE
 #define SOCK_SHUTDOWN ESHUTDOWN
 
+#ifndef SD_BOTH
+#define SD_BOTH 2
+#endif
+
 #endif /*osdSockH*/