diff -urN src/gnuwin32/fixed/etc/Makeconf src.new/gnuwin32/fixed/etc/Makeconf
--- src/gnuwin32/fixed/etc/Makeconf	2016-03-30 18:55:32.114800100 +0100
+++ src.new/gnuwin32/fixed/etc/Makeconf	2016-03-30 19:12:47.189673300 +0100
@@ -58,7 +58,7 @@
 
 ## For use in packages
 GRAPHAPP_LIB = -lRgraphapp
-TCL_VERSION = 85
+TCL_VERSION = 86
 # was a reference to Rzlib.dll in R < 3.2.0
 ZLIB_LIBS = -lz
 
