--- a/IlmImf/ImfSystemSpecific.h	Tue Jun 18 21:51:39 2013
+++ b/IlmImf/ImfSystemSpecific.h	Mon Aug 12 00:39:35 2013
@@ -61,8 +61,13 @@
 static void* EXRAllocAligned(size_t size, size_t alignment)
 {
     void* ptr = 0;
+#if !defined(__sun)
     posix_memalign(&ptr, alignment, size);
     return ptr;
+#else
+// Solaris 10 doesn't have posix_memalign()
+    return memalign(alignment, size);
+#endif
 }