diff --git a/include/dimm.idl b/include/dimm.idl
index 528c0c518e4..ab74d4acda2 100644
--- a/include/dimm.idl
+++ b/include/dimm.idl
@@ -16,7 +16,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#ifndef DO_NO_IMPORTS
 import "unknwn.idl";
+#endif
 
 cpp_quote("#include <imm.h>")