diff --git a/gnu/usr.bin/cc/include/tm.h b/gnu/usr.bin/cc/include/tm.h
index 4219d726e797..a6d42181ef94 100644
--- a/gnu/usr.bin/cc/include/tm.h
+++ b/gnu/usr.bin/cc/include/tm.h
@@ -33,13 +33,11 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__=2 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
 
-#if 0
 #define INCLUDE_DEFAULTS { \
 	{ "/usr/include", 0 }, \
 	{ "/usr/include/g++", 1 }, \
 	{ 0, 0} \
 	}
-#endif
 
 /* Like the default, except no -lg.  */
 #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"