diff --git a/build/bakefiles/multilib.bkl b/build/bakefiles/multilib.bkl
index f61aab6618..a977678950 100644
--- a/build/bakefiles/multilib.bkl
+++ b/build/bakefiles/multilib.bkl
@@ -7,7 +7,8 @@
     
     <dll id="basedll" template="wx_dll"
          cond="SHARED=='1' and MONOLITHIC=='0'">
-        <define>WXMAKINGDLL</define>
+        <define>WXUSINGDLL</define>
+        <define>WXMAKINGDLL_BASE</define>
         <define>wxUSE_BASE=1</define>
         <define>wxUSE_GUI=0</define> 
         <sources>$(BASE_SRC) $(BASE_AND_GUI_SRC)</sources>
@@ -26,7 +27,8 @@
     
     <dll id="coredll" template="wx_dll"
          cond="SHARED=='1' and USE_GUI=='1' and MONOLITHIC=='0'">
-        <define>WXMAKINGDLL</define>
+        <define>WXUSINGDLL</define>
+        <define>WXMAKINGDLL_CORE</define>
         <define>wxUSE_BASE=0</define> 
         <sources>$(BASE_AND_GUI_SRC) $(CORE_SRC)</sources>
         <library>basedll</library>
@@ -45,7 +47,8 @@
     
     <dll id="htmldll" template="wx_dll"
          cond="SHARED=='1' and USE_GUI=='1' and MONOLITHIC=='0'">
-        <define>WXMAKINGDLL</define>
+        <define>WXUSINGDLL</define>
+        <define>WXMAKINGDLL_HTML</define>
         <sources>$(HTML_SRC)</sources>
         <library>coredll</library>
         <library>basedll</library>