diff --git a/include/stream.h b/include/stream.h
index a2a84c46..2ab3a896 100644
--- a/include/stream.h
+++ b/include/stream.h
@@ -32,7 +32,7 @@ namespace Php {
 /**
  *  Class definition
  */
-class Stream
+class PHPCPP_EXPORT Stream
 {
 private:
     /**