diff --git a/src/openvr_api_public.cpp b/src/openvr_api_public.cpp
index dc5f2d4..8143b1e 100644
--- a/src/openvr_api_public.cpp
+++ b/src/openvr_api_public.cpp
@@ -1,5 +1,6 @@
 //========= Copyright Valve Corporation ============//
 #define VR_API_EXPORT 1
+#define VR_API_PUBLIC 1
 #include "openvr.h"
 #include "ivrclientcore.h"
 #include <vrcommon/pathtools_public.h>