1 files changed, 2 insertions, 1 deletions
diff --git a/src/IO.hh b/src/IO.hh
index 330a8d1..0d4ec6a 100644
--- a/src/IO.hh
+++ b/src/IO.hh
@@ -1,8 +1,9 @@
 #ifndef __IO_HH_
 #define __IO_HH_
 #include "Arch.h"
+#include "IEEEIOWinDllApi.h"
 
-class IObase {
+class IEEEIO_API IObase {
 public:
   //-----------------------Public Enums....................
   enum AccessMode {Read=0,Write=1,Create=1,Append=2};