Index: Jamfile.v2
===================================================================
RCS file: /cvsroot/boost/boost/libs/iostreams/build/Jamfile.v2,v
retrieving revision 1.4
diff -u -r1.4 Jamfile.v2
--- Jamfile.v2	20 Feb 2006 14:55:40 -0000	1.4
+++ Jamfile.v2	21 Feb 2006 09:15:07 -0000
@@ -40,7 +40,7 @@
         EXIT "Wrong library name passed to 'create-library' in libs/iostream/build/Jamfile.v2" ;
     }
 
-    if [ os.name ] = NT && ! $($(LIB)_SOURCE) && $($(LIB)_INCLUDE)
+    if [ os.name ] = NT && ! $($(LIB)_SOURCE) && ! $($(LIB)_INCLUDE)
     {
         if $(debug)
         {