diff --git a/lib/ns/descr b/lib/ns/descr
index 75637237..9b668010 100644
--- a/lib/ns/descr
+++ b/lib/ns/descr
@@ -10,6 +10,7 @@ var NAME=NS
 var LIB=lib/{M}/tail_
 var RT=lib/{M}/head_
 var CPP_F=-D__unix
+var INCLUDES=-I{EM}/include/_tail_mon
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
 var ALIGN=-a0:2 -a1:2 -a2:2 -a3:2