diff --git a/c++tools/server.cc b/c++tools/server.cc
index eded5c50628aabf8589f587542fafe68280ecc44..79905eca9accc45928cca4859ff7e5183fb0e7cb 100644
--- a/c++tools/server.cc
+++ b/c++tools/server.cc
@@ -753,8 +753,10 @@ server (bool ipv6, int sock_fd, module_resolver *resolver)
 		      }
 		  }
 
+#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
 	      if (active < 0 && sock_fd >= 0 && FD_ISSET (sock_fd, &readers))
 		active = -1;
+#endif
 	    }
 
 	  if (active >= 0)