diff --git a/stb_rect_pack.h b/stb_rect_pack.h
index 6a633ce66..8f9e3a316 100644
--- a/stb_rect_pack.h
+++ b/stb_rect_pack.h
@@ -71,8 +71,12 @@
 #ifdef STBRP_STATIC
 #define STBRP_DEF static
 #else
+#ifdef _MSC_VER
+#define STBRP_DEF extern __declspec(dllexport)
+#else
 #define STBRP_DEF extern
 #endif
+#endif
 
 #ifdef __cplusplus
 extern "C" {