diff --git a/contrib/build/deprecated/deprecated.bkl b/contrib/build/deprecated/deprecated.bkl
index eac0cda1d8..625f75b77a 100644
--- a/contrib/build/deprecated/deprecated.bkl
+++ b/contrib/build/deprecated/deprecated.bkl
@@ -42,11 +42,13 @@
         <sources>$(DEPRECATED_SRC)</sources>
         <wx-lib>core</wx-lib>
         <wx-lib>base</wx-lib>
+        <precomp-headers-exclude>dosyacc.c</precomp-headers-exclude>
     </dll>
     
     <lib id="deprecatedlib" template="wx_contrib_lib" cond="SHARED=='0'">
         <include>$(SRCDIR)</include>
         <sources>$(DEPRECATED_SRC)</sources>
+        <precomp-headers-exclude>dosyacc.c</precomp-headers-exclude>
     </lib>
     
     <set var="MSVC6PRJ_MERGED_TARGETS" append="1">deprecated=deprecatedlib+deprecateddll</set>
diff --git a/contrib/build/deprecated/deprecated.dsp b/contrib/build/deprecated/deprecated.dsp
index c41e0b6213..b60cab51b9 100644
--- a/contrib/build/deprecated/deprecated.dsp
+++ b/contrib/build/deprecated/deprecated.dsp
@@ -453,6 +453,7 @@ LIB32=link.exe -lib
 # Begin Source File
 
 SOURCE=../../src/deprecated\dosyacc.c
+# SUBTRACT CPP /YX /Yc /Yu
 # End Source File
 # Begin Source File