diff --git a/src/duk_config.h b/src/duk_config.h
index a942563..8d3d309 100644
--- a/src/duk_config.h
+++ b/src/duk_config.h
@@ -64,7 +64,7 @@

 /* DLL build detection */
 /* not configured for DLL build */
-#undef DUK_F_DLL_BUILD
+// #undef DUK_F_DLL_BUILD

 /* Apple OSX, iOS */
 #if defined(__APPLE__)