Index: win/makefile.vc
===================================================================
diff -u -re3446f62bd699bfc8438fc21f5887a02b3cd1fb8 -r93011b62a440d59747d47887cadec0f767ada061
--- win/makefile.vc	(.../makefile.vc)	(revision e3446f62bd699bfc8438fc21f5887a02b3cd1fb8)
+++ win/makefile.vc	(.../makefile.vc)	(revision 93011b62a440d59747d47887cadec0f767ada061)
@@ -287,7 +287,7 @@
 BIN_INSTALL_DIR		= $(PRJ_INSTALL_DIR)
 DOC_INSTALL_DIR		= $(PRJ_INSTALL_DIR)
 SCRIPT_INSTALL_DIR	= $(PRJ_INSTALL_DIR)
-INCLUDE_INSTALL_DIR	= $(_TCLDIR)\include
+INCLUDE_INSTALL_DIR	= $(_INSTALLDIR)\include
 
 ### The following paths CANNOT have spaces in them.
 GENERICDIR	= $(ROOT)\generic