Index: win/rules.vc
===================================================================
diff -u -rc7abd01585e06664f9925485f2c1a5d6a2dbdabb -rccc0e58c0aa5a545fbc1efe2063b621878c0fcb9
--- win/rules.vc	(.../rules.vc)	(revision c7abd01585e06664f9925485f2c1a5d6a2dbdabb)
+++ win/rules.vc	(.../rules.vc)	(revision ccc0e58c0aa5a545fbc1efe2063b621878c0fcb9)
@@ -433,7 +433,7 @@
 # Set our defines now armed with our options.
 #----------------------------------------------------------
 
-OPTDEFINES	= -DTCL_CFGVAL_ENCODING=$(CFG_ENCODING) -DSTDC_HEADERS
+OPTDEFINES	= -DTCL_CFGVAL_ENCODING=$(CFG_ENCODING) -DSTDC_HEADERS -D
 
 !if $(TCL_MEM_DEBUG)
 OPTDEFINES	= $(OPTDEFINES) -DTCL_MEM_DEBUG
@@ -464,6 +464,10 @@
 OPTDEFINES	= $(OPTDEFINES) -DTCL_CFG_DO64BIT
 !endif
 
+# See also http://core.tcl.tk/tclconfig/tktview?name=ab69a602bf
+!if $(VCVERSION) > 1300
+OPTDEFINES	= $(OPTDEFINES) -DHAVE_UINTPTR_T -DHAVE_INTPTR_T
+!endif
 
 #----------------------------------------------------------
 # Get common info used when building extensions.