Index: descriptor_ops.hpp
===================================================================
--- descriptor_ops.hpp	(revision 48518)
+++ descriptor_ops.hpp	(working copy)
@@ -63,14 +63,24 @@
 
 inline void init_buf(buf& b, void* data, size_t size)
 {
+#if (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
+  b.iov_base = static_cast<caddr_t>(data);
+  b.iov_len = size;
+#else // (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
   b.iov_base = data;
   b.iov_len = size;
+#endif
 }
 
 inline void init_buf(buf& b, const void* data, size_t size)
 {
+#if (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
+  b.iov_base = static_cast<caddr_t>(const_cast<void*>(data));
+  b.iov_len = size;
+#else // (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
   b.iov_base = const_cast<void*>(data);
   b.iov_len = size;
+#endif
 }
 
 inline int scatter_read(int d, buf* bufs, size_t count,
Index: socket_ops.hpp
===================================================================
--- socket_ops.hpp	(revision 48518)
+++ socket_ops.hpp	(working copy)
@@ -214,6 +214,9 @@
 #if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
   b.buf = static_cast<char*>(data);
   b.len = static_cast<u_long>(size);
+#elif (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
+  b.iov_base = static_cast<caddr_t>(data);
+  b.iov_len = size;
 #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
   b.iov_base = data;
   b.iov_len = size;
@@ -225,6 +228,9 @@
 #if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
   b.buf = static_cast<char*>(const_cast<void*>(data));
   b.len = static_cast<u_long>(size);
+#elif (defined(sun) || defined(__sun)) && defined(__SUNPRO_CC)
+  b.iov_base = static_cast<caddr_t>(const_cast<void*>(data));
+  b.iov_len = size;
 #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
   b.iov_base = const_cast<void*>(data);
   b.iov_len = size;