diff --git a/include/ruby/defines.h b/include/ruby/defines.h
index 1a9b37e2c7..1437978bfd 100644
--- a/include/ruby/defines.h
+++ b/include/ruby/defines.h
@@ -194,6 +194,8 @@ void xfree(void*);
 
 #if defined(__BEOS__) && !defined(__HAIKU__) && !defined(BONE)
 #include <net/socket.h> /* intern.h needs fd_set definition */
+#elif defined (__SYMBIAN32__) && defined (HAVE_SYS_SELECT_H)
+# include <sys/select.h>
 #endif
 
 #ifdef RUBY_EXPORT