diff --git a/src/libCom/osi/devLib.c b/src/libCom/osi/devLib.c
index e5cd1d000..36c741604 100644
--- a/src/libCom/osi/devLib.c
+++ b/src/libCom/osi/devLib.c
@@ -25,6 +25,7 @@ static const char sccsID[] = "@(#) $Id$";
 #include <stdio.h>
 #include <stdlib.h>
 
+#define epicsExportSharedSymbols
 #include "dbDefs.h"
 #include "epicsMutex.h"
 #include "errlog.h"