diff --git a/panda/src/pipeline/thread.h b/panda/src/pipeline/thread.h
index a07bce16d4..d428d17b8d 100644
--- a/panda/src/pipeline/thread.h
+++ b/panda/src/pipeline/thread.h
@@ -94,7 +94,7 @@ PUBLISHED:
 public:
   // This class allows integration with PStats, particularly in the
   // SIMPLE_THREADS case.
-  class PStatsCallback {
+  class EXPCL_PANDA PStatsCallback {
   public:
     virtual void deactivate_hook(Thread *thread);
     virtual void activate_hook(Thread *thread);