diff --git a/panda/src/bullet/bulletWorld.h b/panda/src/bullet/bulletWorld.h
index 9c709c1e91..67607923dd 100644
--- a/panda/src/bullet/bulletWorld.h
+++ b/panda/src/bullet/bulletWorld.h
@@ -43,7 +43,7 @@ class BulletPersistentManifold;
 class BulletShape;
 class BulletSoftBodyWorldInfo;
 
-extern PT(CallbackObject) bullet_contact_added_callback;
+extern EXPCL_PANDABULLET PT(CallbackObject) bullet_contact_added_callback;
 
 /**
  *