Index: build.jam
===================================================================
--- build.jam	(revision 47366)
+++ build.jam	(working copy)
@@ -250,7 +250,7 @@
     : /nologo
     [ opt --release : /ML /O2 /Ob2 /Gy /GF /GA /GB ]
     [ opt --debug : /MLd /DEBUG /Z7 /Od /Ob0 ]
-    -I$(--python-include) -I$(--extra-include)
+    "-I$(--python-include)" "-I$(--extra-include)"
     : kernel32.lib advapi32.lib user32.lib $(--python-lib[1]) ;
 ## QNX 6.x GCC 3.x/2.95.3
 toolset qcc qcc : "-o " : -D
@@ -322,7 +322,7 @@
     : /nologo
     [ opt --release : /MT /O2 /Ob2 /Gy /GF /GA /wd4996 ]
     [ opt --debug : /MTd /DEBUG /Z7 /Od /Ob0 /wd4996 ]
-    -I$(--python-include) -I$(--extra-include)
+    \"-I$(--python-include)\" \"-I$(--extra-include)\"
     : kernel32.lib advapi32.lib user32.lib $(--python-lib[1]) ;
 ## VMS/OpenVMS DEC C
 toolset vmsdecc cc : /OBJECT= : "/DEFINES=(" "," ")"