diff --git a/r5dev/r5dev.def b/r5dev/r5dev.def
index 3438df9f..d3afbc7a 100644
--- a/r5dev/r5dev.def
+++ b/r5dev/r5dev.def
@@ -1,4 +1,4 @@
-LIBRARY r5apexsdkd
+LIBRARY r5apexsdkd64
 
 EXPORTS
     DummyExport @1