--- ibis/Make2.g++.old	Thu Feb 12 00:45:01 2004
+++ ibis/Make2.g++	Thu Feb 12 00:45:35 2004
@@ -25,6 +25,7 @@
 
 CCC = g++
 CCFLAGS = \
+-DNEEDS_IS_INF -DNEEDS_IS_NAN \
 -DUNIX -O2 -DNDEBUG -I.. -I. -fexceptions -W
 LIBS = -lm
 LDFLAGS =
