diff --git a/dtool/src/dtoolbase/dtoolsymbols.h b/dtool/src/dtoolbase/dtoolsymbols.h
index 3b4ad021f6..9f09d24fe0 100644
--- a/dtool/src/dtoolbase/dtoolsymbols.h
+++ b/dtool/src/dtoolbase/dtoolsymbols.h
@@ -34,6 +34,8 @@
   can define all of these stupid symbols to the empty string.
   */
 
+#define EXPCL_EMPTY
+
 #if defined(PENV_WIN32) && !defined(CPPPARSER)
 
 #ifdef BUILDING_DTOOL