diff --git a/libs/evoral/test/SMFTest.cpp b/libs/evoral/test/SMFTest.cpp
index d4b2a28aff..fe9efa479f 100644
--- a/libs/evoral/test/SMFTest.cpp
+++ b/libs/evoral/test/SMFTest.cpp
@@ -1,5 +1,9 @@
 #include "SMFTest.hpp"
 
+#ifdef WIN32
+#include <io.h> // for R_OK
+#endif
+
 using namespace std;
 
 CPPUNIT_TEST_SUITE_REGISTRATION( SMFTest );