diff --git a/dtool/pptempl/compilerSettings.pp b/dtool/pptempl/compilerSettings.pp
index 1c5ada0b3e..c7c0a3c654 100644
--- a/dtool/pptempl/compilerSettings.pp
+++ b/dtool/pptempl/compilerSettings.pp
@@ -52,6 +52,7 @@
   #if $[DO_CROSSOBJ_OPT]
      #define OPT4FLAGS /GL
      #define LDFLAGS_OPT4 /LTCG
+     #define LIBBER /LTCG
   #endif 
   
   // remove 1-3 when allocator stuff is rewritten to build with VC7 STL